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Finding the Fourth Proportional to 730.15, 1,007.88 and 450.43

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Solution

The fourth proportional to 730.15, 1,007.88 and 450.43 is: 621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.15 : 1,007.88 = 450.43 : x
  2. Step 2: Convert to fraction form
    730.15/1,007.88 = 450.43/x
  3. Step 3: Cross multiply
    730.15x = 1,007.88 × 450.43
  4. Step 4: Simplify right side
    730.15x = 453,979.39
  5. Step 5: Solve for x
    x = 453,979.39/730.15
  6. Step 6: Final answer
    x = 621.76

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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.