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Finding the Fourth Proportional to 292.18, 439.49 and 289.74

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Solution

The fourth proportional to 292.18, 439.49 and 289.74 is: 435.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.18 : 439.49 = 289.74 : x
  2. Step 2: Convert to fraction form
    292.18/439.49 = 289.74/x
  3. Step 3: Cross multiply
    292.18x = 439.49 × 289.74
  4. Step 4: Simplify right side
    292.18x = 127,337.83
  5. Step 5: Solve for x
    x = 127,337.83/292.18
  6. Step 6: Final answer
    x = 435.82

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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.