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Finding the Fourth Proportional to 492,618.28, 679,820.78 and 288,620.39

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Solution

The fourth proportional to 492,618.28, 679,820.78 and 288,620.39 is: 398,300.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,618.28 : 679,820.78 = 288,620.39 : x
  2. Step 2: Convert to fraction form
    492,618.28/679,820.78 = 288,620.39/x
  3. Step 3: Cross multiply
    492,618.28x = 679,820.78 × 288,620.39
  4. Step 4: Simplify right side
    492,618.28x = 196,210,138,653.70
  5. Step 5: Solve for x
    x = 196,210,138,653.70/492,618.28
  6. Step 6: Final answer
    x = 398,300.56

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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.