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Finding the Fourth Proportional to 387,127.98, 580,426.62 and 197,220.78

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Solution

The fourth proportional to 387,127.98, 580,426.62 and 197,220.78 is: 295,695.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,127.98 : 580,426.62 = 197,220.78 : x
  2. Step 2: Convert to fraction form
    387,127.98/580,426.62 = 197,220.78/x
  3. Step 3: Cross multiply
    387,127.98x = 580,426.62 × 197,220.78
  4. Step 4: Simplify right side
    387,127.98x = 114,472,190,729.16
  5. Step 5: Solve for x
    x = 114,472,190,729.16/387,127.98
  6. Step 6: Final answer
    x = 295,695.99

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1.5x scale

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.