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Finding the Fourth Proportional to 317.52, 478.53 and 286.74

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Solution

The fourth proportional to 317.52, 478.53 and 286.74 is: 432.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.52 : 478.53 = 286.74 : x
  2. Step 2: Convert to fraction form
    317.52/478.53 = 286.74/x
  3. Step 3: Cross multiply
    317.52x = 478.53 × 286.74
  4. Step 4: Simplify right side
    317.52x = 137,213.69
  5. Step 5: Solve for x
    x = 137,213.69/317.52
  6. Step 6: Final answer
    x = 432.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.