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Finding the Fourth Proportional to 613.80, 847.53 and 473.72

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Solution

The fourth proportional to 613.80, 847.53 and 473.72 is: 654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.80 : 847.53 = 473.72 : x
  2. Step 2: Convert to fraction form
    613.80/847.53 = 473.72/x
  3. Step 3: Cross multiply
    613.80x = 847.53 × 473.72
  4. Step 4: Simplify right side
    613.80x = 401,487.67
  5. Step 5: Solve for x
    x = 401,487.67/613.80
  6. Step 6: Final answer
    x = 654.10

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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.