Home / 763,397.40-1,145,096.10-687,289.80

Finding the Fourth Proportional to 763,397.40, 1,145,096.10 and 687,289.80

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Solution

The fourth proportional to 763,397.40, 1,145,096.10 and 687,289.80 is: 1,030,934.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,397.40 : 1,145,096.10 = 687,289.80 : x
  2. Step 2: Convert to fraction form
    763,397.40/1,145,096.10 = 687,289.80/x
  3. Step 3: Cross multiply
    763,397.40x = 1,145,096.10 × 687,289.80
  4. Step 4: Simplify right side
    763,397.40x = 787,012,869,549.78
  5. Step 5: Solve for x
    x = 787,012,869,549.78/763,397.40
  6. Step 6: Final answer
    x = 1,030,934.70

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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.