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Finding the Fourth Proportional to 810,642.12, 1,215,671.58 and 278,025

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Solution

The fourth proportional to 810,642.12, 1,215,671.58 and 278,025 is: 416,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,642.12 : 1,215,671.58 = 278,025 : x
  2. Step 2: Convert to fraction form
    810,642.12/1,215,671.58 = 278,025/x
  3. Step 3: Cross multiply
    810,642.12x = 1,215,671.58 × 278,025
  4. Step 4: Simplify right side
    810,642.12x = 337,987,091,029.50
  5. Step 5: Solve for x
    x = 337,987,091,029.50/810,642.12
  6. Step 6: Final answer
    x = 416,937.49

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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.