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Finding the Fourth Proportional to 438,417.80, 656,460.30 and 279,787.40

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Solution

The fourth proportional to 438,417.80, 656,460.30 and 279,787.40 is: 418,936.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,417.80 : 656,460.30 = 279,787.40 : x
  2. Step 2: Convert to fraction form
    438,417.80/656,460.30 = 279,787.40/x
  3. Step 3: Cross multiply
    438,417.80x = 656,460.30 × 279,787.40
  4. Step 4: Simplify right side
    438,417.80x = 183,669,320,540.22
  5. Step 5: Solve for x
    x = 183,669,320,540.22/438,417.80
  6. Step 6: Final answer
    x = 418,936.73

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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.