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Finding the Fourth Proportional to 258,625.80, 387,938.70 and 169,979.40

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Solution

The fourth proportional to 258,625.80, 387,938.70 and 169,979.40 is: 254,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,625.80 : 387,938.70 = 169,979.40 : x
  2. Step 2: Convert to fraction form
    258,625.80/387,938.70 = 169,979.40/x
  3. Step 3: Cross multiply
    258,625.80x = 387,938.70 × 169,979.40
  4. Step 4: Simplify right side
    258,625.80x = 65,941,587,462.78
  5. Step 5: Solve for x
    x = 65,941,587,462.78/258,625.80
  6. Step 6: Final answer
    x = 254,969.10

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1.5x scale

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.