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Finding the Fourth Proportional to 358.47, 535.20 and 317.57

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Solution

The fourth proportional to 358.47, 535.20 and 317.57 is: 474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.47 : 535.20 = 317.57 : x
  2. Step 2: Convert to fraction form
    358.47/535.20 = 317.57/x
  3. Step 3: Cross multiply
    358.47x = 535.20 × 317.57
  4. Step 4: Simplify right side
    358.47x = 169,959.60
  5. Step 5: Solve for x
    x = 169,959.60/358.47
  6. Step 6: Final answer
    x = 474.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.