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Finding the Fourth Proportional to 680,916.96, 939,522.48 and 394,419.84

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Solution

The fourth proportional to 680,916.96, 939,522.48 and 394,419.84 is: 544,216.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,916.96 : 939,522.48 = 394,419.84 : x
  2. Step 2: Convert to fraction form
    680,916.96/939,522.48 = 394,419.84/x
  3. Step 3: Cross multiply
    680,916.96x = 939,522.48 × 394,419.84
  4. Step 4: Simplify right side
    680,916.96x = 370,566,306,238.00
  5. Step 5: Solve for x
    x = 370,566,306,238.00/680,916.96
  6. Step 6: Final answer
    x = 544,216.59

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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.