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Finding the Fourth Proportional to 487,488.40, 730,937.28 and 318,805.12

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Solution

The fourth proportional to 487,488.40, 730,937.28 and 318,805.12 is: 478,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,488.40 : 730,937.28 = 318,805.12 : x
  2. Step 2: Convert to fraction form
    487,488.40/730,937.28 = 318,805.12/x
  3. Step 3: Cross multiply
    487,488.40x = 730,937.28 × 318,805.12
  4. Step 4: Simplify right side
    487,488.40x = 233,026,547,262.87
  5. Step 5: Solve for x
    x = 233,026,547,262.87/487,488.40
  6. Step 6: Final answer
    x = 478,014.55

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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.