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Finding the Fourth Proportional to 720,354.88, 1,080,578.40 and 277,122.88

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Solution

The fourth proportional to 720,354.88, 1,080,578.40 and 277,122.88 is: 415,702.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,354.88 : 1,080,578.40 = 277,122.88 : x
  2. Step 2: Convert to fraction form
    720,354.88/1,080,578.40 = 277,122.88/x
  3. Step 3: Cross multiply
    720,354.88x = 1,080,578.40 × 277,122.88
  4. Step 4: Simplify right side
    720,354.88x = 299,452,998,273.79
  5. Step 5: Solve for x
    x = 299,452,998,273.79/720,354.88
  6. Step 6: Final answer
    x = 415,702.05

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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.