Home / 287,590,516.20-431,385,774.30-80,328,526.20

Finding the Fourth Proportional to 287,590,516.20, 431,385,774.30 and 80,328,526.20

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Solution

The fourth proportional to 287,590,516.20, 431,385,774.30 and 80,328,526.20 is: 120,492,789.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,590,516.20 : 431,385,774.30 = 80,328,526.20 : x
  2. Step 2: Convert to fraction form
    287,590,516.20/431,385,774.30 = 80,328,526.20/x
  3. Step 3: Cross multiply
    287,590,516.20x = 431,385,774.30 × 80,328,526.20
  4. Step 4: Simplify right side
    287,590,516.20x = 34,652,583,473,164,840
  5. Step 5: Solve for x
    x = 34,652,583,473,164,840/287,590,516.20
  6. Step 6: Final answer
    x = 120,492,789.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.