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Finding the Fourth Proportional to 678,030.72, 935,863.92 and 423,228.48

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Solution

The fourth proportional to 678,030.72, 935,863.92 and 423,228.48 is: 584,168.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,030.72 : 935,863.92 = 423,228.48 : x
  2. Step 2: Convert to fraction form
    678,030.72/935,863.92 = 423,228.48/x
  3. Step 3: Cross multiply
    678,030.72x = 935,863.92 × 423,228.48
  4. Step 4: Simplify right side
    678,030.72x = 396,084,264,348.44
  5. Step 5: Solve for x
    x = 396,084,264,348.44/678,030.72
  6. Step 6: Final answer
    x = 584,168.61

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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.