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Finding the Fourth Proportional to 663,577.56, 915,802.74 and 391,735.08

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Solution

The fourth proportional to 663,577.56, 915,802.74 and 391,735.08 is: 540,633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,577.56 : 915,802.74 = 391,735.08 : x
  2. Step 2: Convert to fraction form
    663,577.56/915,802.74 = 391,735.08/x
  3. Step 3: Cross multiply
    663,577.56x = 915,802.74 × 391,735.08
  4. Step 4: Simplify right side
    663,577.56x = 358,752,059,618.12
  5. Step 5: Solve for x
    x = 358,752,059,618.12/663,577.56
  6. Step 6: Final answer
    x = 540,633.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.