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Finding the Fourth Proportional to 612.47, 845.21 and 332.70

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Solution

The fourth proportional to 612.47, 845.21 and 332.70 is: 459.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.47 : 845.21 = 332.70 : x
  2. Step 2: Convert to fraction form
    612.47/845.21 = 332.70/x
  3. Step 3: Cross multiply
    612.47x = 845.21 × 332.70
  4. Step 4: Simplify right side
    612.47x = 281,199.70
  5. Step 5: Solve for x
    x = 281,199.70/612.47
  6. Step 6: Final answer
    x = 459.13

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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.