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Finding the Fourth Proportional to 618,402.90, 927,580.10 and 258,480.80

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Solution

The fourth proportional to 618,402.90, 927,580.10 and 258,480.80 is: 387,711.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,402.90 : 927,580.10 = 258,480.80 : x
  2. Step 2: Convert to fraction form
    618,402.90/927,580.10 = 258,480.80/x
  3. Step 3: Cross multiply
    618,402.90x = 927,580.10 × 258,480.80
  4. Step 4: Simplify right side
    618,402.90x = 239,761,646,312.08
  5. Step 5: Solve for x
    x = 239,761,646,312.08/618,402.90
  6. Step 6: Final answer
    x = 387,711.06

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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.