Home / 785,354.10-1,178,031.15-280,485.15

Finding the Fourth Proportional to 785,354.10, 1,178,031.15 and 280,485.15

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Solution

The fourth proportional to 785,354.10, 1,178,031.15 and 280,485.15 is: 420,727.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,354.10 : 1,178,031.15 = 280,485.15 : x
  2. Step 2: Convert to fraction form
    785,354.10/1,178,031.15 = 280,485.15/x
  3. Step 3: Cross multiply
    785,354.10x = 1,178,031.15 × 280,485.15
  4. Step 4: Simplify right side
    785,354.10x = 330,420,243,812.42
  5. Step 5: Solve for x
    x = 330,420,243,812.42/785,354.10
  6. Step 6: Final answer
    x = 420,727.73

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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.