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Finding the Fourth Proportional to 465,366.32, 642,135.56 and 261,378.15

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Solution

The fourth proportional to 465,366.32, 642,135.56 and 261,378.15 is: 360,662.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,366.32 : 642,135.56 = 261,378.15 : x
  2. Step 2: Convert to fraction form
    465,366.32/642,135.56 = 261,378.15/x
  3. Step 3: Cross multiply
    465,366.32x = 642,135.56 × 261,378.15
  4. Step 4: Simplify right side
    465,366.32x = 167,840,201,511.34
  5. Step 5: Solve for x
    x = 167,840,201,511.34/465,366.32
  6. Step 6: Final answer
    x = 360,662.55

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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.