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Finding the Fourth Proportional to 590.74, 815.19 and 328.77

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Solution

The fourth proportional to 590.74, 815.19 and 328.77 is: 453.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.74 : 815.19 = 328.77 : x
  2. Step 2: Convert to fraction form
    590.74/815.19 = 328.77/x
  3. Step 3: Cross multiply
    590.74x = 815.19 × 328.77
  4. Step 4: Simplify right side
    590.74x = 268,010.02
  5. Step 5: Solve for x
    x = 268,010.02/590.74
  6. Step 6: Final answer
    x = 453.69

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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.