Home / 987,999.20-1,482,387.60-388,858.40

Finding the Fourth Proportional to 987,999.20, 1,482,387.60 and 388,858.40

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Solution

The fourth proportional to 987,999.20, 1,482,387.60 and 388,858.40 is: 583,440.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,999.20 : 1,482,387.60 = 388,858.40 : x
  2. Step 2: Convert to fraction form
    987,999.20/1,482,387.60 = 388,858.40/x
  3. Step 3: Cross multiply
    987,999.20x = 1,482,387.60 × 388,858.40
  4. Step 4: Simplify right side
    987,999.20x = 576,438,870,315.84
  5. Step 5: Solve for x
    x = 576,438,870,315.84/987,999.20
  6. Step 6: Final answer
    x = 583,440.62

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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.