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Finding the Fourth Proportional to 387,808.64, 581,398.56 and 174,420.32

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Solution

The fourth proportional to 387,808.64, 581,398.56 and 174,420.32 is: 261,489.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,808.64 : 581,398.56 = 174,420.32 : x
  2. Step 2: Convert to fraction form
    387,808.64/581,398.56 = 174,420.32/x
  3. Step 3: Cross multiply
    387,808.64x = 581,398.56 × 174,420.32
  4. Step 4: Simplify right side
    387,808.64x = 101,407,722,882.74
  5. Step 5: Solve for x
    x = 101,407,722,882.74/387,808.64
  6. Step 6: Final answer
    x = 261,489.08

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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.