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Finding the Fourth Proportional to 642,744.50, 886,985.87 and 352,355.55

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Solution

The fourth proportional to 642,744.50, 886,985.87 and 352,355.55 is: 486,249.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,744.50 : 886,985.87 = 352,355.55 : x
  2. Step 2: Convert to fraction form
    642,744.50/886,985.87 = 352,355.55/x
  3. Step 3: Cross multiply
    642,744.50x = 886,985.87 × 352,355.55
  4. Step 4: Simplify right side
    642,744.50x = 312,534,392,304.30
  5. Step 5: Solve for x
    x = 312,534,392,304.30/642,744.50
  6. Step 6: Final answer
    x = 486,249.82

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1.5x scale

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.