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Finding the Fourth Proportional to 632.19, 947.65 and 285.74

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Solution

The fourth proportional to 632.19, 947.65 and 285.74 is: 428.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.19 : 947.65 = 285.74 : x
  2. Step 2: Convert to fraction form
    632.19/947.65 = 285.74/x
  3. Step 3: Cross multiply
    632.19x = 947.65 × 285.74
  4. Step 4: Simplify right side
    632.19x = 270,781.51
  5. Step 5: Solve for x
    x = 270,781.51/632.19
  6. Step 6: Final answer
    x = 428.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.