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Finding the Fourth Proportional to 677,712.15, 935,238.96 and 371,780.69

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Solution

The fourth proportional to 677,712.15, 935,238.96 and 371,780.69 is: 513,055.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,712.15 : 935,238.96 = 371,780.69 : x
  2. Step 2: Convert to fraction form
    677,712.15/935,238.96 = 371,780.69/x
  3. Step 3: Cross multiply
    677,712.15x = 935,238.96 × 371,780.69
  4. Step 4: Simplify right side
    677,712.15x = 347,703,781,187.49
  5. Step 5: Solve for x
    x = 347,703,781,187.49/677,712.15
  6. Step 6: Final answer
    x = 513,055.26

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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.