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Finding the Fourth Proportional to 1,000.39, 1,501.36 and 653.63

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Solution

The fourth proportional to 1,000.39, 1,501.36 and 653.63 is: 980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.39 : 1,501.36 = 653.63 : x
  2. Step 2: Convert to fraction form
    1,000.39/1,501.36 = 653.63/x
  3. Step 3: Cross multiply
    1,000.39x = 1,501.36 × 653.63
  4. Step 4: Simplify right side
    1,000.39x = 981,333.94
  5. Step 5: Solve for x
    x = 981,333.94/1,000.39
  6. Step 6: Final answer
    x = 980.95

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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.