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Finding the Fourth Proportional to 1,000.76, 1,500.08 and 479.86

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Solution

The fourth proportional to 1,000.76, 1,500.08 and 479.86 is: 719.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.76 : 1,500.08 = 479.86 : x
  2. Step 2: Convert to fraction form
    1,000.76/1,500.08 = 479.86/x
  3. Step 3: Cross multiply
    1,000.76x = 1,500.08 × 479.86
  4. Step 4: Simplify right side
    1,000.76x = 719,828.39
  5. Step 5: Solve for x
    x = 719,828.39/1,000.76
  6. Step 6: Final answer
    x = 719.28

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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.