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Finding the Fourth Proportional to 829.61, 1,144.89 and 456.57

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Solution

The fourth proportional to 829.61, 1,144.89 and 456.57 is: 630.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.61 : 1,144.89 = 456.57 : x
  2. Step 2: Convert to fraction form
    829.61/1,144.89 = 456.57/x
  3. Step 3: Cross multiply
    829.61x = 1,144.89 × 456.57
  4. Step 4: Simplify right side
    829.61x = 522,722.43
  5. Step 5: Solve for x
    x = 522,722.43/829.61
  6. Step 6: Final answer
    x = 630.08

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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.