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Finding the Fourth Proportional to 615.47, 849.92 and 492.75

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Solution

The fourth proportional to 615.47, 849.92 and 492.75 is: 680.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.47 : 849.92 = 492.75 : x
  2. Step 2: Convert to fraction form
    615.47/849.92 = 492.75/x
  3. Step 3: Cross multiply
    615.47x = 849.92 × 492.75
  4. Step 4: Simplify right side
    615.47x = 418,795.62
  5. Step 5: Solve for x
    x = 418,795.62/615.47
  6. Step 6: Final answer
    x = 680.45

Related Problems

Find fourth proportional to 307.73, 424.96 and 246.38
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Double scale
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Similar ratio
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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.