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Finding the Fourth Proportional to 265,628.80, 398,660.80 and 263,555.20

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Solution

The fourth proportional to 265,628.80, 398,660.80 and 263,555.20 is: 395,548.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,628.80 : 398,660.80 = 263,555.20 : x
  2. Step 2: Convert to fraction form
    265,628.80/398,660.80 = 263,555.20/x
  3. Step 3: Cross multiply
    265,628.80x = 398,660.80 × 263,555.20
  4. Step 4: Simplify right side
    265,628.80x = 105,069,126,876.16
  5. Step 5: Solve for x
    x = 105,069,126,876.16/265,628.80
  6. Step 6: Final answer
    x = 395,548.70

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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.