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Finding the Fourth Proportional to 753.10, 1,124.71 and 631.46

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Solution

The fourth proportional to 753.10, 1,124.71 and 631.46 is: 943.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.10 : 1,124.71 = 631.46 : x
  2. Step 2: Convert to fraction form
    753.10/1,124.71 = 631.46/x
  3. Step 3: Cross multiply
    753.10x = 1,124.71 × 631.46
  4. Step 4: Simplify right side
    753.10x = 710,209.38
  5. Step 5: Solve for x
    x = 710,209.38/753.10
  6. Step 6: Final answer
    x = 943.05

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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.