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Finding the Fourth Proportional to 679,642.55, 937,886.89 and 373,718.61

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Solution

The fourth proportional to 679,642.55, 937,886.89 and 373,718.61 is: 515,720.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,642.55 : 937,886.89 = 373,718.61 : x
  2. Step 2: Convert to fraction form
    679,642.55/937,886.89 = 373,718.61/x
  3. Step 3: Cross multiply
    679,642.55x = 937,886.89 × 373,718.61
  4. Step 4: Simplify right side
    679,642.55x = 350,505,784,868.02
  5. Step 5: Solve for x
    x = 350,505,784,868.02/679,642.55
  6. Step 6: Final answer
    x = 515,720.78

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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.