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Finding the Fourth Proportional to 730.32, 1,006.20 and 611.79

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Solution

The fourth proportional to 730.32, 1,006.20 and 611.79 is: 842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.32 : 1,006.20 = 611.79 : x
  2. Step 2: Convert to fraction form
    730.32/1,006.20 = 611.79/x
  3. Step 3: Cross multiply
    730.32x = 1,006.20 × 611.79
  4. Step 4: Simplify right side
    730.32x = 615,583.10
  5. Step 5: Solve for x
    x = 615,583.10/730.32
  6. Step 6: Final answer
    x = 842.90

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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.