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Finding the Fourth Proportional to 487,639.40, 731,459.10 and 404,695.40

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Solution

The fourth proportional to 487,639.40, 731,459.10 and 404,695.40 is: 607,043.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,639.40 : 731,459.10 = 404,695.40 : x
  2. Step 2: Convert to fraction form
    487,639.40/731,459.10 = 404,695.40/x
  3. Step 3: Cross multiply
    487,639.40x = 731,459.10 × 404,695.40
  4. Step 4: Simplify right side
    487,639.40x = 296,018,133,058.14
  5. Step 5: Solve for x
    x = 296,018,133,058.14/487,639.40
  6. Step 6: Final answer
    x = 607,043.10

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Similar ratio
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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.