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Finding the Fourth Proportional to 587.70, 881.40 and 279.69

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Solution

The fourth proportional to 587.70, 881.40 and 279.69 is: 419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.70 : 881.40 = 279.69 : x
  2. Step 2: Convert to fraction form
    587.70/881.40 = 279.69/x
  3. Step 3: Cross multiply
    587.70x = 881.40 × 279.69
  4. Step 4: Simplify right side
    587.70x = 246,518.77
  5. Step 5: Solve for x
    x = 246,518.77/587.70
  6. Step 6: Final answer
    x = 419.46

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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.