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Finding the Fourth Proportional to 590.66, 886.80 and 407.60

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Solution

The fourth proportional to 590.66, 886.80 and 407.60 is: 611.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.66 : 886.80 = 407.60 : x
  2. Step 2: Convert to fraction form
    590.66/886.80 = 407.60/x
  3. Step 3: Cross multiply
    590.66x = 886.80 × 407.60
  4. Step 4: Simplify right side
    590.66x = 361,459.68
  5. Step 5: Solve for x
    x = 361,459.68/590.66
  6. Step 6: Final answer
    x = 611.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.