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Finding the Fourth Proportional to 1,139.01, 1,708.38 and 846.87

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Solution

The fourth proportional to 1,139.01, 1,708.38 and 846.87 is: 1,270.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.01 : 1,708.38 = 846.87 : x
  2. Step 2: Convert to fraction form
    1,139.01/1,708.38 = 846.87/x
  3. Step 3: Cross multiply
    1,139.01x = 1,708.38 × 846.87
  4. Step 4: Simplify right side
    1,139.01x = 1,446,775.77
  5. Step 5: Solve for x
    x = 1,446,775.77/1,139.01
  6. Step 6: Final answer
    x = 1,270.20

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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.