Home / 830,511.40-1,245,306.30-331,311.40

Finding the Fourth Proportional to 830,511.40, 1,245,306.30 and 331,311.40

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Solution

The fourth proportional to 830,511.40, 1,245,306.30 and 331,311.40 is: 496,783.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,511.40 : 1,245,306.30 = 331,311.40 : x
  2. Step 2: Convert to fraction form
    830,511.40/1,245,306.30 = 331,311.40/x
  3. Step 3: Cross multiply
    830,511.40x = 1,245,306.30 × 331,311.40
  4. Step 4: Simplify right side
    830,511.40x = 412,584,173,681.82
  5. Step 5: Solve for x
    x = 412,584,173,681.82/830,511.40
  6. Step 6: Final answer
    x = 496,783.28

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Double scale
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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.