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Finding the Fourth Proportional to 658,840.80, 988,261.20 and 517,123.20

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Solution

The fourth proportional to 658,840.80, 988,261.20 and 517,123.20 is: 775,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,840.80 : 988,261.20 = 517,123.20 : x
  2. Step 2: Convert to fraction form
    658,840.80/988,261.20 = 517,123.20/x
  3. Step 3: Cross multiply
    658,840.80x = 988,261.20 × 517,123.20
  4. Step 4: Simplify right side
    658,840.80x = 511,052,794,179.84
  5. Step 5: Solve for x
    x = 511,052,794,179.84/658,840.80
  6. Step 6: Final answer
    x = 775,684.80

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1.5x scale

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.