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Finding the Fourth Proportional to 292.60, 438.80 and 155.57

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Solution

The fourth proportional to 292.60, 438.80 and 155.57 is: 233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.60 : 438.80 = 155.57 : x
  2. Step 2: Convert to fraction form
    292.60/438.80 = 155.57/x
  3. Step 3: Cross multiply
    292.60x = 438.80 × 155.57
  4. Step 4: Simplify right side
    292.60x = 68,263.43
  5. Step 5: Solve for x
    x = 68,263.43/292.60
  6. Step 6: Final answer
    x = 233.30

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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.