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Finding the Fourth Proportional to 680,655.61, 939,287.57 and 374,728.93

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Solution

The fourth proportional to 680,655.61, 939,287.57 and 374,728.93 is: 517,116.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,655.61 : 939,287.57 = 374,728.93 : x
  2. Step 2: Convert to fraction form
    680,655.61/939,287.57 = 374,728.93/x
  3. Step 3: Cross multiply
    680,655.61x = 939,287.57 × 374,728.93
  4. Step 4: Simplify right side
    680,655.61x = 351,978,228,183.95
  5. Step 5: Solve for x
    x = 351,978,228,183.95/680,655.61
  6. Step 6: Final answer
    x = 517,116.48

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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.