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Finding the Fourth Proportional to 261,022.80, 392,117.40 and 251,108.40

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Solution

The fourth proportional to 261,022.80, 392,117.40 and 251,108.40 is: 377,223.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,022.80 : 392,117.40 = 251,108.40 : x
  2. Step 2: Convert to fraction form
    261,022.80/392,117.40 = 251,108.40/x
  3. Step 3: Cross multiply
    261,022.80x = 392,117.40 × 251,108.40
  4. Step 4: Simplify right side
    261,022.80x = 98,463,972,926.16
  5. Step 5: Solve for x
    x = 98,463,972,926.16/261,022.80
  6. Step 6: Final answer
    x = 377,223.65

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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.