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Finding the Fourth Proportional to 829.65, 1,144.88 and 456.65

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Solution

The fourth proportional to 829.65, 1,144.88 and 456.65 is: 630.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.65 : 1,144.88 = 456.65 : x
  2. Step 2: Convert to fraction form
    829.65/1,144.88 = 456.65/x
  3. Step 3: Cross multiply
    829.65x = 1,144.88 × 456.65
  4. Step 4: Simplify right side
    829.65x = 522,801.44
  5. Step 5: Solve for x
    x = 522,801.44/829.65
  6. Step 6: Final answer
    x = 630.15

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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.