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Finding the Fourth Proportional to 730.72, 1,008.85 and 465.31

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Solution

The fourth proportional to 730.72, 1,008.85 and 465.31 is: 642.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.72 : 1,008.85 = 465.31 : x
  2. Step 2: Convert to fraction form
    730.72/1,008.85 = 465.31/x
  3. Step 3: Cross multiply
    730.72x = 1,008.85 × 465.31
  4. Step 4: Simplify right side
    730.72x = 469,424.31
  5. Step 5: Solve for x
    x = 469,424.31/730.72
  6. Step 6: Final answer
    x = 642.42

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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.