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Finding the Fourth Proportional to 426,177.80, 639,266.70 and 248,593.40

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Solution

The fourth proportional to 426,177.80, 639,266.70 and 248,593.40 is: 372,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,177.80 : 639,266.70 = 248,593.40 : x
  2. Step 2: Convert to fraction form
    426,177.80/639,266.70 = 248,593.40/x
  3. Step 3: Cross multiply
    426,177.80x = 639,266.70 × 248,593.40
  4. Step 4: Simplify right side
    426,177.80x = 158,917,482,459.78
  5. Step 5: Solve for x
    x = 158,917,482,459.78/426,177.80
  6. Step 6: Final answer
    x = 372,890.10

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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.