Home / 781,551-1,078,540.38-442,011.96

Finding the Fourth Proportional to 781,551, 1,078,540.38 and 442,011.96

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Solution

The fourth proportional to 781,551, 1,078,540.38 and 442,011.96 is: 609,976.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,551 : 1,078,540.38 = 442,011.96 : x
  2. Step 2: Convert to fraction form
    781,551/1,078,540.38 = 442,011.96/x
  3. Step 3: Cross multiply
    781,551x = 1,078,540.38 × 442,011.96
  4. Step 4: Simplify right side
    781,551x = 476,727,747,302.95
  5. Step 5: Solve for x
    x = 476,727,747,302.95/781,551
  6. Step 6: Final answer
    x = 609,976.50

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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.