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Finding the Fourth Proportional to 415,612.08, 623,436.64 and 127,402.48

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Solution

The fourth proportional to 415,612.08, 623,436.64 and 127,402.48 is: 191,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,612.08 : 623,436.64 = 127,402.48 : x
  2. Step 2: Convert to fraction form
    415,612.08/623,436.64 = 127,402.48/x
  3. Step 3: Cross multiply
    415,612.08x = 623,436.64 × 127,402.48
  4. Step 4: Simplify right side
    415,612.08x = 79,427,374,058.87
  5. Step 5: Solve for x
    x = 79,427,374,058.87/415,612.08
  6. Step 6: Final answer
    x = 191,109.40

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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.