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Finding the Fourth Proportional to 590.64, 815.12 and 328.68

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Solution

The fourth proportional to 590.64, 815.12 and 328.68 is: 453.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.64 : 815.12 = 328.68 : x
  2. Step 2: Convert to fraction form
    590.64/815.12 = 328.68/x
  3. Step 3: Cross multiply
    590.64x = 815.12 × 328.68
  4. Step 4: Simplify right side
    590.64x = 267,913.64
  5. Step 5: Solve for x
    x = 267,913.64/590.64
  6. Step 6: Final answer
    x = 453.60

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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.