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Finding the Fourth Proportional to 888,157.80, 1,225,670.70 and 500,991.72

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Solution

The fourth proportional to 888,157.80, 1,225,670.70 and 500,991.72 is: 691,375.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,157.80 : 1,225,670.70 = 500,991.72 : x
  2. Step 2: Convert to fraction form
    888,157.80/1,225,670.70 = 500,991.72/x
  3. Step 3: Cross multiply
    888,157.80x = 1,225,670.70 × 500,991.72
  4. Step 4: Simplify right side
    888,157.80x = 614,050,872,146.60
  5. Step 5: Solve for x
    x = 614,050,872,146.60/888,157.80
  6. Step 6: Final answer
    x = 691,375.87

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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.