Home / 989,742.30-1,389,371.70-989,742.30

Finding the Fourth Proportional to 989,742.30, 1,389,371.70 and 989,742.30

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Solution

The fourth proportional to 989,742.30, 1,389,371.70 and 989,742.30 is: 1,389,371.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,742.30 : 1,389,371.70 = 989,742.30 : x
  2. Step 2: Convert to fraction form
    989,742.30/1,389,371.70 = 989,742.30/x
  3. Step 3: Cross multiply
    989,742.30x = 1,389,371.70 × 989,742.30
  4. Step 4: Simplify right side
    989,742.30x = 1,375,119,941,912.91
  5. Step 5: Solve for x
    x = 1,375,119,941,912.91/989,742.30
  6. Step 6: Final answer
    x = 1,389,371.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.