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Finding the Fourth Proportional to 684,188.74, 944,139.72 and 378,246.79

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Solution

The fourth proportional to 684,188.74, 944,139.72 and 378,246.79 is: 521,958.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,188.74 : 944,139.72 = 378,246.79 : x
  2. Step 2: Convert to fraction form
    684,188.74/944,139.72 = 378,246.79/x
  3. Step 3: Cross multiply
    684,188.74x = 944,139.72 × 378,246.79
  4. Step 4: Simplify right side
    684,188.74x = 357,117,818,401.50
  5. Step 5: Solve for x
    x = 357,117,818,401.50/684,188.74
  6. Step 6: Final answer
    x = 521,958.05

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Similar ratio
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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.