Home / 680,537.40-939,132.38-378,731.40

Finding the Fourth Proportional to 680,537.40, 939,132.38 and 378,731.40

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Solution

The fourth proportional to 680,537.40, 939,132.38 and 378,731.40 is: 522,644.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,537.40 : 939,132.38 = 378,731.40 : x
  2. Step 2: Convert to fraction form
    680,537.40/939,132.38 = 378,731.40/x
  3. Step 3: Cross multiply
    680,537.40x = 939,132.38 × 378,731.40
  4. Step 4: Simplify right side
    680,537.40x = 355,678,921,062.73
  5. Step 5: Solve for x
    x = 355,678,921,062.73/680,537.40
  6. Step 6: Final answer
    x = 522,644.19

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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.