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Finding the Fourth Proportional to 753.84, 1,125.27 and 656.19

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Solution

The fourth proportional to 753.84, 1,125.27 and 656.19 is: 979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.84 : 1,125.27 = 656.19 : x
  2. Step 2: Convert to fraction form
    753.84/1,125.27 = 656.19/x
  3. Step 3: Cross multiply
    753.84x = 1,125.27 × 656.19
  4. Step 4: Simplify right side
    753.84x = 738,390.92
  5. Step 5: Solve for x
    x = 738,390.92/753.84
  6. Step 6: Final answer
    x = 979.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.