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Finding the Fourth Proportional to 679,969.89, 938,360.65 and 374,069.54

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Solution

The fourth proportional to 679,969.89, 938,360.65 and 374,069.54 is: 516,217.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,969.89 : 938,360.65 = 374,069.54 : x
  2. Step 2: Convert to fraction form
    679,969.89/938,360.65 = 374,069.54/x
  3. Step 3: Cross multiply
    679,969.89x = 938,360.65 × 374,069.54
  4. Step 4: Simplify right side
    679,969.89x = 351,012,138,811.71
  5. Step 5: Solve for x
    x = 351,012,138,811.71/679,969.89
  6. Step 6: Final answer
    x = 516,217.18

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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.