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Finding the Fourth Proportional to 625,427, 863,181.90 and 396,005.62

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Solution

The fourth proportional to 625,427, 863,181.90 and 396,005.62 is: 546,546.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,427 : 863,181.90 = 396,005.62 : x
  2. Step 2: Convert to fraction form
    625,427/863,181.90 = 396,005.62/x
  3. Step 3: Cross multiply
    625,427x = 863,181.90 × 396,005.62
  4. Step 4: Simplify right side
    625,427x = 341,824,883,482.28
  5. Step 5: Solve for x
    x = 341,824,883,482.28/625,427
  6. Step 6: Final answer
    x = 546,546.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.