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Finding the Fourth Proportional to 1,153.58, 1,591.95 and 656.34

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Solution

The fourth proportional to 1,153.58, 1,591.95 and 656.34 is: 905.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.58 : 1,591.95 = 656.34 : x
  2. Step 2: Convert to fraction form
    1,153.58/1,591.95 = 656.34/x
  3. Step 3: Cross multiply
    1,153.58x = 1,591.95 × 656.34
  4. Step 4: Simplify right side
    1,153.58x = 1,044,860.46
  5. Step 5: Solve for x
    x = 1,044,860.46/1,153.58
  6. Step 6: Final answer
    x = 905.76

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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.