Home / 724,999.40-1,087,499.10-688,257.80

Finding the Fourth Proportional to 724,999.40, 1,087,499.10 and 688,257.80

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Solution

The fourth proportional to 724,999.40, 1,087,499.10 and 688,257.80 is: 1,032,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,999.40 : 1,087,499.10 = 688,257.80 : x
  2. Step 2: Convert to fraction form
    724,999.40/1,087,499.10 = 688,257.80/x
  3. Step 3: Cross multiply
    724,999.40x = 1,087,499.10 × 688,257.80
  4. Step 4: Simplify right side
    724,999.40x = 748,479,738,067.98
  5. Step 5: Solve for x
    x = 748,479,738,067.98/724,999.40
  6. Step 6: Final answer
    x = 1,032,386.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.