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Finding the Fourth Proportional to 468,078.80, 645,947.34 and 253,218.82

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Solution

The fourth proportional to 468,078.80, 645,947.34 and 253,218.82 is: 349,441.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,078.80 : 645,947.34 = 253,218.82 : x
  2. Step 2: Convert to fraction form
    468,078.80/645,947.34 = 253,218.82/x
  3. Step 3: Cross multiply
    468,078.80x = 645,947.34 × 253,218.82
  4. Step 4: Simplify right side
    468,078.80x = 163,566,023,216.94
  5. Step 5: Solve for x
    x = 163,566,023,216.94/468,078.80
  6. Step 6: Final answer
    x = 349,441.21

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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.