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Finding the Fourth Proportional to 292.90, 439.53 and 130.72

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Solution

The fourth proportional to 292.90, 439.53 and 130.72 is: 196.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.90 : 439.53 = 130.72 : x
  2. Step 2: Convert to fraction form
    292.90/439.53 = 130.72/x
  3. Step 3: Cross multiply
    292.90x = 439.53 × 130.72
  4. Step 4: Simplify right side
    292.90x = 57,455.36
  5. Step 5: Solve for x
    x = 57,455.36/292.90
  6. Step 6: Final answer
    x = 196.16

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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.