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Finding the Fourth Proportional to 586.25, 878.98 and 289.72

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Solution

The fourth proportional to 586.25, 878.98 and 289.72 is: 434.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.25 : 878.98 = 289.72 : x
  2. Step 2: Convert to fraction form
    586.25/878.98 = 289.72/x
  3. Step 3: Cross multiply
    586.25x = 878.98 × 289.72
  4. Step 4: Simplify right side
    586.25x = 254,658.09
  5. Step 5: Solve for x
    x = 254,658.09/586.25
  6. Step 6: Final answer
    x = 434.38

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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.