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Finding the Fourth Proportional to 754.30, 1,041.05 and 545.15

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Solution

The fourth proportional to 754.30, 1,041.05 and 545.15 is: 752.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.30 : 1,041.05 = 545.15 : x
  2. Step 2: Convert to fraction form
    754.30/1,041.05 = 545.15/x
  3. Step 3: Cross multiply
    754.30x = 1,041.05 × 545.15
  4. Step 4: Simplify right side
    754.30x = 567,528.41
  5. Step 5: Solve for x
    x = 567,528.41/754.30
  6. Step 6: Final answer
    x = 752.39

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Double scale
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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.