Home / 1,389,380.87-2,083,779.70-391,875.59

Finding the Fourth Proportional to 1,389,380.87, 2,083,779.70 and 391,875.59

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Solution

The fourth proportional to 1,389,380.87, 2,083,779.70 and 391,875.59 is: 587,731.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,380.87 : 2,083,779.70 = 391,875.59 : x
  2. Step 2: Convert to fraction form
    1,389,380.87/2,083,779.70 = 391,875.59/x
  3. Step 3: Cross multiply
    1,389,380.87x = 2,083,779.70 × 391,875.59
  4. Step 4: Simplify right side
    1,389,380.87x = 816,582,399,367.52
  5. Step 5: Solve for x
    x = 816,582,399,367.52/1,389,380.87
  6. Step 6: Final answer
    x = 587,731.14

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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.