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Finding the Fourth Proportional to 861,873, 1,292,809.50 and 270,897

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Solution

The fourth proportional to 861,873, 1,292,809.50 and 270,897 is: 406,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,873 : 1,292,809.50 = 270,897 : x
  2. Step 2: Convert to fraction form
    861,873/1,292,809.50 = 270,897/x
  3. Step 3: Cross multiply
    861,873x = 1,292,809.50 × 270,897
  4. Step 4: Simplify right side
    861,873x = 350,218,215,121.50
  5. Step 5: Solve for x
    x = 350,218,215,121.50/861,873
  6. Step 6: Final answer
    x = 406,345.50

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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.