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Finding the Fourth Proportional to 664,454.20, 996,681.30 and 487,307.20

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Solution

The fourth proportional to 664,454.20, 996,681.30 and 487,307.20 is: 730,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,454.20 : 996,681.30 = 487,307.20 : x
  2. Step 2: Convert to fraction form
    664,454.20/996,681.30 = 487,307.20/x
  3. Step 3: Cross multiply
    664,454.20x = 996,681.30 × 487,307.20
  4. Step 4: Simplify right side
    664,454.20x = 485,689,973,595.36
  5. Step 5: Solve for x
    x = 485,689,973,595.36/664,454.20
  6. Step 6: Final answer
    x = 730,960.80

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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.