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Finding the Fourth Proportional to 472.79, 652.12 and 285.95

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Solution

The fourth proportional to 472.79, 652.12 and 285.95 is: 394.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.79 : 652.12 = 285.95 : x
  2. Step 2: Convert to fraction form
    472.79/652.12 = 285.95/x
  3. Step 3: Cross multiply
    472.79x = 652.12 × 285.95
  4. Step 4: Simplify right side
    472.79x = 186,473.71
  5. Step 5: Solve for x
    x = 186,473.71/472.79
  6. Step 6: Final answer
    x = 394.42

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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.