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Finding the Fourth Proportional to 679,729.80, 938,098.80 and 389,364.54

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Solution

The fourth proportional to 679,729.80, 938,098.80 and 389,364.54 is: 537,364.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,729.80 : 938,098.80 = 389,364.54 : x
  2. Step 2: Convert to fraction form
    679,729.80/938,098.80 = 389,364.54/x
  3. Step 3: Cross multiply
    679,729.80x = 938,098.80 × 389,364.54
  4. Step 4: Simplify right side
    679,729.80x = 365,262,407,736.55
  5. Step 5: Solve for x
    x = 365,262,407,736.55/679,729.80
  6. Step 6: Final answer
    x = 537,364.12

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1.5x scale

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.