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Finding the Fourth Proportional to 438,246.80, 656,203.80 and 279,616.40

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Solution

The fourth proportional to 438,246.80, 656,203.80 and 279,616.40 is: 418,680.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,246.80 : 656,203.80 = 279,616.40 : x
  2. Step 2: Convert to fraction form
    438,246.80/656,203.80 = 279,616.40/x
  3. Step 3: Cross multiply
    438,246.80x = 656,203.80 × 279,616.40
  4. Step 4: Simplify right side
    438,246.80x = 183,485,344,222.32
  5. Step 5: Solve for x
    x = 183,485,344,222.32/438,246.80
  6. Step 6: Final answer
    x = 418,680.40

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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.