Home / 642,864.48-887,165.01-352,456.80

Finding the Fourth Proportional to 642,864.48, 887,165.01 and 352,456.80

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Solution

The fourth proportional to 642,864.48, 887,165.01 and 352,456.80 is: 486,396.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,864.48 : 887,165.01 = 352,456.80 : x
  2. Step 2: Convert to fraction form
    642,864.48/887,165.01 = 352,456.80/x
  3. Step 3: Cross multiply
    642,864.48x = 887,165.01 × 352,456.80
  4. Step 4: Simplify right side
    642,864.48x = 312,687,340,496.57
  5. Step 5: Solve for x
    x = 312,687,340,496.57/642,864.48
  6. Step 6: Final answer
    x = 486,396.98

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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.