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Finding the Fourth Proportional to 1,004.55, 1,502.77 and 869.10

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Solution

The fourth proportional to 1,004.55, 1,502.77 and 869.10 is: 1,300.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.55 : 1,502.77 = 869.10 : x
  2. Step 2: Convert to fraction form
    1,004.55/1,502.77 = 869.10/x
  3. Step 3: Cross multiply
    1,004.55x = 1,502.77 × 869.10
  4. Step 4: Simplify right side
    1,004.55x = 1,306,057.41
  5. Step 5: Solve for x
    x = 1,306,057.41/1,004.55
  6. Step 6: Final answer
    x = 1,300.14

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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.