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Finding the Fourth Proportional to 490,691.40, 736,037.10 and 331,259.10

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Solution

The fourth proportional to 490,691.40, 736,037.10 and 331,259.10 is: 496,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,691.40 : 736,037.10 = 331,259.10 : x
  2. Step 2: Convert to fraction form
    490,691.40/736,037.10 = 331,259.10/x
  3. Step 3: Cross multiply
    490,691.40x = 736,037.10 × 331,259.10
  4. Step 4: Simplify right side
    490,691.40x = 243,818,987,312.61
  5. Step 5: Solve for x
    x = 243,818,987,312.61/490,691.40
  6. Step 6: Final answer
    x = 496,888.65

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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.