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Finding the Fourth Proportional to 1,158.13, 1,597.62 and 784.98

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Solution

The fourth proportional to 1,158.13, 1,597.62 and 784.98 is: 1,082.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.13 : 1,597.62 = 784.98 : x
  2. Step 2: Convert to fraction form
    1,158.13/1,597.62 = 784.98/x
  3. Step 3: Cross multiply
    1,158.13x = 1,597.62 × 784.98
  4. Step 4: Simplify right side
    1,158.13x = 1,254,099.75
  5. Step 5: Solve for x
    x = 1,254,099.75/1,158.13
  6. Step 6: Final answer
    x = 1,082.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.