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Finding the Fourth Proportional to 469,118.28, 647,367.30 and 278,018.40

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Solution

The fourth proportional to 469,118.28, 647,367.30 and 278,018.40 is: 383,655.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,118.28 : 647,367.30 = 278,018.40 : x
  2. Step 2: Convert to fraction form
    469,118.28/647,367.30 = 278,018.40/x
  3. Step 3: Cross multiply
    469,118.28x = 647,367.30 × 278,018.40
  4. Step 4: Simplify right side
    469,118.28x = 179,980,020,958.32
  5. Step 5: Solve for x
    x = 179,980,020,958.32/469,118.28
  6. Step 6: Final answer
    x = 383,655.95

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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.