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Finding the Fourth Proportional to 715,203.05, 986,980.59 and 392,933.90

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Solution

The fourth proportional to 715,203.05, 986,980.59 and 392,933.90 is: 542,249.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,203.05 : 986,980.59 = 392,933.90 : x
  2. Step 2: Convert to fraction form
    715,203.05/986,980.59 = 392,933.90/x
  3. Step 3: Cross multiply
    715,203.05x = 986,980.59 × 392,933.90
  4. Step 4: Simplify right side
    715,203.05x = 387,818,134,920.45
  5. Step 5: Solve for x
    x = 387,818,134,920.45/715,203.05
  6. Step 6: Final answer
    x = 542,249.00

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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.