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Finding the Fourth Proportional to 725.19, 1,000.86 and 430.56

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Solution

The fourth proportional to 725.19, 1,000.86 and 430.56 is: 594.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.19 : 1,000.86 = 430.56 : x
  2. Step 2: Convert to fraction form
    725.19/1,000.86 = 430.56/x
  3. Step 3: Cross multiply
    725.19x = 1,000.86 × 430.56
  4. Step 4: Simplify right side
    725.19x = 430,930.28
  5. Step 5: Solve for x
    x = 430,930.28/725.19
  6. Step 6: Final answer
    x = 594.23

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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.