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Finding the Fourth Proportional to 487,002.64, 672,130.40 and 280,266.80

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Solution

The fourth proportional to 487,002.64, 672,130.40 and 280,266.80 is: 386,806.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,002.64 : 672,130.40 = 280,266.80 : x
  2. Step 2: Convert to fraction form
    487,002.64/672,130.40 = 280,266.80/x
  3. Step 3: Cross multiply
    487,002.64x = 672,130.40 × 280,266.80
  4. Step 4: Simplify right side
    487,002.64x = 188,375,836,390.72
  5. Step 5: Solve for x
    x = 188,375,836,390.72/487,002.64
  6. Step 6: Final answer
    x = 386,806.60

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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.