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Finding the Fourth Proportional to 802,987.78, 1,108,123.05 and 445,291.78

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Solution

The fourth proportional to 802,987.78, 1,108,123.05 and 445,291.78 is: 614,502.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,987.78 : 1,108,123.05 = 445,291.78 : x
  2. Step 2: Convert to fraction form
    802,987.78/1,108,123.05 = 445,291.78/x
  3. Step 3: Cross multiply
    802,987.78x = 1,108,123.05 × 445,291.78
  4. Step 4: Simplify right side
    802,987.78x = 493,438,085,393.53
  5. Step 5: Solve for x
    x = 493,438,085,393.53/802,987.78
  6. Step 6: Final answer
    x = 614,502.61

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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.