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Finding the Fourth Proportional to 390,032.60, 585,308.10 and 221,552.60

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Solution

The fourth proportional to 390,032.60, 585,308.10 and 221,552.60 is: 332,476.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,032.60 : 585,308.10 = 221,552.60 : x
  2. Step 2: Convert to fraction form
    390,032.60/585,308.10 = 221,552.60/x
  3. Step 3: Cross multiply
    390,032.60x = 585,308.10 × 221,552.60
  4. Step 4: Simplify right side
    390,032.60x = 129,676,531,356.06
  5. Step 5: Solve for x
    x = 129,676,531,356.06/390,032.60
  6. Step 6: Final answer
    x = 332,476.13

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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.