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Finding the Fourth Proportional to 658,126.72, 908,058.66 and 399,999.16

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Solution

The fourth proportional to 658,126.72, 908,058.66 and 399,999.16 is: 551,903.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,126.72 : 908,058.66 = 399,999.16 : x
  2. Step 2: Convert to fraction form
    658,126.72/908,058.66 = 399,999.16/x
  3. Step 3: Cross multiply
    658,126.72x = 908,058.66 × 399,999.16
  4. Step 4: Simplify right side
    658,126.72x = 363,222,701,230.73
  5. Step 5: Solve for x
    x = 363,222,701,230.73/658,126.72
  6. Step 6: Final answer
    x = 551,903.90

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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.