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Finding the Fourth Proportional to 261.66, 392.50 and 162.87

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Solution

The fourth proportional to 261.66, 392.50 and 162.87 is: 244.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.66 : 392.50 = 162.87 : x
  2. Step 2: Convert to fraction form
    261.66/392.50 = 162.87/x
  3. Step 3: Cross multiply
    261.66x = 392.50 × 162.87
  4. Step 4: Simplify right side
    261.66x = 63,925.21
  5. Step 5: Solve for x
    x = 63,925.21/261.66
  6. Step 6: Final answer
    x = 244.30

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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.