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Finding the Fourth Proportional to 262.04, 392.85 and 140.40

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Solution

The fourth proportional to 262.04, 392.85 and 140.40 is: 210.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.04 : 392.85 = 140.40 : x
  2. Step 2: Convert to fraction form
    262.04/392.85 = 140.40/x
  3. Step 3: Cross multiply
    262.04x = 392.85 × 140.40
  4. Step 4: Simplify right side
    262.04x = 55,156.14
  5. Step 5: Solve for x
    x = 55,156.14/262.04
  6. Step 6: Final answer
    x = 210.49

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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.