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Finding the Fourth Proportional to 292.51, 438.86 and 130.20

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Solution

The fourth proportional to 292.51, 438.86 and 130.20 is: 195.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.51 : 438.86 = 130.20 : x
  2. Step 2: Convert to fraction form
    292.51/438.86 = 130.20/x
  3. Step 3: Cross multiply
    292.51x = 438.86 × 130.20
  4. Step 4: Simplify right side
    292.51x = 57,139.57
  5. Step 5: Solve for x
    x = 57,139.57/292.51
  6. Step 6: Final answer
    x = 195.35

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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.