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Finding the Fourth Proportional to 642,110.52, 886,119.04 and 387,412.50

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Solution

The fourth proportional to 642,110.52, 886,119.04 and 387,412.50 is: 534,633.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,110.52 : 886,119.04 = 387,412.50 : x
  2. Step 2: Convert to fraction form
    642,110.52/886,119.04 = 387,412.50/x
  3. Step 3: Cross multiply
    642,110.52x = 886,119.04 × 387,412.50
  4. Step 4: Simplify right side
    642,110.52x = 343,293,592,584
  5. Step 5: Solve for x
    x = 343,293,592,584/642,110.52
  6. Step 6: Final answer
    x = 534,633.19

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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.