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Finding the Fourth Proportional to 810,648.12, 1,215,680.58 and 278,031

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Solution

The fourth proportional to 810,648.12, 1,215,680.58 and 278,031 is: 416,946.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,648.12 : 1,215,680.58 = 278,031 : x
  2. Step 2: Convert to fraction form
    810,648.12/1,215,680.58 = 278,031/x
  3. Step 3: Cross multiply
    810,648.12x = 1,215,680.58 × 278,031
  4. Step 4: Simplify right side
    810,648.12x = 337,996,887,337.98
  5. Step 5: Solve for x
    x = 337,996,887,337.98/810,648.12
  6. Step 6: Final answer
    x = 416,946.49

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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.