Home / 785,998.80-1,178,998.20-287,557.20

Finding the Fourth Proportional to 785,998.80, 1,178,998.20 and 287,557.20

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Solution

The fourth proportional to 785,998.80, 1,178,998.20 and 287,557.20 is: 431,335.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,998.80 : 1,178,998.20 = 287,557.20 : x
  2. Step 2: Convert to fraction form
    785,998.80/1,178,998.20 = 287,557.20/x
  3. Step 3: Cross multiply
    785,998.80x = 1,178,998.20 × 287,557.20
  4. Step 4: Simplify right side
    785,998.80x = 339,029,421,197.04
  5. Step 5: Solve for x
    x = 339,029,421,197.04/785,998.80
  6. Step 6: Final answer
    x = 431,335.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.