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Finding the Fourth Proportional to 862,727.40, 1,190,565 and 480,745.80

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Solution

The fourth proportional to 862,727.40, 1,190,565 and 480,745.80 is: 663,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,727.40 : 1,190,565 = 480,745.80 : x
  2. Step 2: Convert to fraction form
    862,727.40/1,190,565 = 480,745.80/x
  3. Step 3: Cross multiply
    862,727.40x = 1,190,565 × 480,745.80
  4. Step 4: Simplify right side
    862,727.40x = 572,359,123,377
  5. Step 5: Solve for x
    x = 572,359,123,377/862,727.40
  6. Step 6: Final answer
    x = 663,429.87

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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.