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Finding the Fourth Proportional to 590.04, 814.40 and 390.92

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Solution

The fourth proportional to 590.04, 814.40 and 390.92 is: 539.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.04 : 814.40 = 390.92 : x
  2. Step 2: Convert to fraction form
    590.04/814.40 = 390.92/x
  3. Step 3: Cross multiply
    590.04x = 814.40 × 390.92
  4. Step 4: Simplify right side
    590.04x = 318,359.22
  5. Step 5: Solve for x
    x = 318,359.22/590.04
  6. Step 6: Final answer
    x = 539.56

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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.