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Finding the Fourth Proportional to 426,305.20, 639,227.40 and 177,012.40

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Solution

The fourth proportional to 426,305.20, 639,227.40 and 177,012.40 is: 265,422.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,305.20 : 639,227.40 = 177,012.40 : x
  2. Step 2: Convert to fraction form
    426,305.20/639,227.40 = 177,012.40/x
  3. Step 3: Cross multiply
    426,305.20x = 639,227.40 × 177,012.40
  4. Step 4: Simplify right side
    426,305.20x = 113,151,176,219.76
  5. Step 5: Solve for x
    x = 113,151,176,219.76/426,305.20
  6. Step 6: Final answer
    x = 265,422.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.