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Finding the Fourth Proportional to 680,159.70, 938,628.29 and 389,765.52

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Solution

The fourth proportional to 680,159.70, 938,628.29 and 389,765.52 is: 537,880.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,159.70 : 938,628.29 = 389,765.52 : x
  2. Step 2: Convert to fraction form
    680,159.70/938,628.29 = 389,765.52/x
  3. Step 3: Cross multiply
    680,159.70x = 938,628.29 × 389,765.52
  4. Step 4: Simplify right side
    680,159.70x = 365,844,944,512.98
  5. Step 5: Solve for x
    x = 365,844,944,512.98/680,159.70
  6. Step 6: Final answer
    x = 537,880.95

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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.