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Finding the Fourth Proportional to 680,595.90, 939,117.18 and 394,060.63

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Solution

The fourth proportional to 680,595.90, 939,117.18 and 394,060.63 is: 543,742.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,595.90 : 939,117.18 = 394,060.63 : x
  2. Step 2: Convert to fraction form
    680,595.90/939,117.18 = 394,060.63/x
  3. Step 3: Cross multiply
    680,595.90x = 939,117.18 × 394,060.63
  4. Step 4: Simplify right side
    680,595.90x = 370,069,105,246.83
  5. Step 5: Solve for x
    x = 370,069,105,246.83/680,595.90
  6. Step 6: Final answer
    x = 543,742.78

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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.