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Finding the Fourth Proportional to 640,830.38, 960,616.80 and 356,657.06

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Solution

The fourth proportional to 640,830.38, 960,616.80 and 356,657.06 is: 534,635.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,830.38 : 960,616.80 = 356,657.06 : x
  2. Step 2: Convert to fraction form
    640,830.38/960,616.80 = 356,657.06/x
  3. Step 3: Cross multiply
    640,830.38x = 960,616.80 × 356,657.06
  4. Step 4: Simplify right side
    640,830.38x = 342,610,766,076.15
  5. Step 5: Solve for x
    x = 342,610,766,076.15/640,830.38
  6. Step 6: Final answer
    x = 534,635.65

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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.