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Finding the Fourth Proportional to 612,881.38, 919,319.01 and 157,472.20

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Solution

The fourth proportional to 612,881.38, 919,319.01 and 157,472.20 is: 236,207.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,881.38 : 919,319.01 = 157,472.20 : x
  2. Step 2: Convert to fraction form
    612,881.38/919,319.01 = 157,472.20/x
  3. Step 3: Cross multiply
    612,881.38x = 919,319.01 × 157,472.20
  4. Step 4: Simplify right side
    612,881.38x = 144,767,187,006.52
  5. Step 5: Solve for x
    x = 144,767,187,006.52/612,881.38
  6. Step 6: Final answer
    x = 236,207.51

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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.