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Finding the Fourth Proportional to 684,013.80, 943,909.54 and 378,074.28

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Solution

The fourth proportional to 684,013.80, 943,909.54 and 378,074.28 is: 521,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,013.80 : 943,909.54 = 378,074.28 : x
  2. Step 2: Convert to fraction form
    684,013.80/943,909.54 = 378,074.28/x
  3. Step 3: Cross multiply
    684,013.80x = 943,909.54 × 378,074.28
  4. Step 4: Simplify right side
    684,013.80x = 356,867,919,720.63
  5. Step 5: Solve for x
    x = 356,867,919,720.63/684,013.80
  6. Step 6: Final answer
    x = 521,726.20

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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.