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Finding the Fourth Proportional to 1,153.34, 1,591.68 and 711.46

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Solution

The fourth proportional to 1,153.34, 1,591.68 and 711.46 is: 981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.34 : 1,591.68 = 711.46 : x
  2. Step 2: Convert to fraction form
    1,153.34/1,591.68 = 711.46/x
  3. Step 3: Cross multiply
    1,153.34x = 1,591.68 × 711.46
  4. Step 4: Simplify right side
    1,153.34x = 1,132,416.65
  5. Step 5: Solve for x
    x = 1,132,416.65/1,153.34
  6. Step 6: Final answer
    x = 981.86

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1.5x scale

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.