Home / 686,606.40-1,029,909.60-648,115.20

Finding the Fourth Proportional to 686,606.40, 1,029,909.60 and 648,115.20

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Solution

The fourth proportional to 686,606.40, 1,029,909.60 and 648,115.20 is: 972,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,606.40 : 1,029,909.60 = 648,115.20 : x
  2. Step 2: Convert to fraction form
    686,606.40/1,029,909.60 = 648,115.20/x
  3. Step 3: Cross multiply
    686,606.40x = 1,029,909.60 × 648,115.20
  4. Step 4: Simplify right side
    686,606.40x = 667,500,066,385.92
  5. Step 5: Solve for x
    x = 667,500,066,385.92/686,606.40
  6. Step 6: Final answer
    x = 972,172.80

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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.