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Finding the Fourth Proportional to 1,153.19, 1,591.13 and 655.76

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Solution

The fourth proportional to 1,153.19, 1,591.13 and 655.76 is: 904.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.19 : 1,591.13 = 655.76 : x
  2. Step 2: Convert to fraction form
    1,153.19/1,591.13 = 655.76/x
  3. Step 3: Cross multiply
    1,153.19x = 1,591.13 × 655.76
  4. Step 4: Simplify right side
    1,153.19x = 1,043,405.03
  5. Step 5: Solve for x
    x = 1,043,405.03/1,153.19
  6. Step 6: Final answer
    x = 904.80

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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.