Home / 763,402.40-1,145,103.60-687,294.80

Finding the Fourth Proportional to 763,402.40, 1,145,103.60 and 687,294.80

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Solution

The fourth proportional to 763,402.40, 1,145,103.60 and 687,294.80 is: 1,030,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,402.40 : 1,145,103.60 = 687,294.80 : x
  2. Step 2: Convert to fraction form
    763,402.40/1,145,103.60 = 687,294.80/x
  3. Step 3: Cross multiply
    763,402.40x = 1,145,103.60 × 687,294.80
  4. Step 4: Simplify right side
    763,402.40x = 787,023,749,741.28
  5. Step 5: Solve for x
    x = 787,023,749,741.28/763,402.40
  6. Step 6: Final answer
    x = 1,030,942.20

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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.