Home / 643,981.30-888,717.09-357,505.90

Finding the Fourth Proportional to 643,981.30, 888,717.09 and 357,505.90

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Solution

The fourth proportional to 643,981.30, 888,717.09 and 357,505.90 is: 493,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,981.30 : 888,717.09 = 357,505.90 : x
  2. Step 2: Convert to fraction form
    643,981.30/888,717.09 = 357,505.90/x
  3. Step 3: Cross multiply
    643,981.30x = 888,717.09 × 357,505.90
  4. Step 4: Simplify right side
    643,981.30x = 317,721,603,105.83
  5. Step 5: Solve for x
    x = 317,721,603,105.83/643,981.30
  6. Step 6: Final answer
    x = 493,370.85

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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.