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Finding the Fourth Proportional to 722,878.32, 997,560.14 and 396,188.82

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Solution

The fourth proportional to 722,878.32, 997,560.14 and 396,188.82 is: 546,734.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,878.32 : 997,560.14 = 396,188.82 : x
  2. Step 2: Convert to fraction form
    722,878.32/997,560.14 = 396,188.82/x
  3. Step 3: Cross multiply
    722,878.32x = 997,560.14 × 396,188.82
  4. Step 4: Simplify right side
    722,878.32x = 395,222,169,757.83
  5. Step 5: Solve for x
    x = 395,222,169,757.83/722,878.32
  6. Step 6: Final answer
    x = 546,734.02

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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.