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Finding the Fourth Proportional to 1,000.11, 1,498.78 and 953.63

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Solution

The fourth proportional to 1,000.11, 1,498.78 and 953.63 is: 1,429.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.11 : 1,498.78 = 953.63 : x
  2. Step 2: Convert to fraction form
    1,000.11/1,498.78 = 953.63/x
  3. Step 3: Cross multiply
    1,000.11x = 1,498.78 × 953.63
  4. Step 4: Simplify right side
    1,000.11x = 1,429,281.57
  5. Step 5: Solve for x
    x = 1,429,281.57/1,000.11
  6. Step 6: Final answer
    x = 1,429.12

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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.