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Finding the Fourth Proportional to 280,979.88, 387,752.22 and 153,655.56

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Solution

The fourth proportional to 280,979.88, 387,752.22 and 153,655.56 is: 212,044.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,979.88 : 387,752.22 = 153,655.56 : x
  2. Step 2: Convert to fraction form
    280,979.88/387,752.22 = 153,655.56/x
  3. Step 3: Cross multiply
    280,979.88x = 387,752.22 × 153,655.56
  4. Step 4: Simplify right side
    280,979.88x = 59,580,284,505.34
  5. Step 5: Solve for x
    x = 59,580,284,505.34/280,979.88
  6. Step 6: Final answer
    x = 212,044.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.