Home / 1,989,731.20-2,982,847.20-1,191,330.40

Finding the Fourth Proportional to 1,989,731.20, 2,982,847.20 and 1,191,330.40

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Solution

The fourth proportional to 1,989,731.20, 2,982,847.20 and 1,191,330.40 is: 1,785,948.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,731.20 : 2,982,847.20 = 1,191,330.40 : x
  2. Step 2: Convert to fraction form
    1,989,731.20/2,982,847.20 = 1,191,330.40/x
  3. Step 3: Cross multiply
    1,989,731.20x = 2,982,847.20 × 1,191,330.40
  4. Step 4: Simplify right side
    1,989,731.20x = 3,553,556,547,914.88
  5. Step 5: Solve for x
    x = 3,553,556,547,914.88/1,989,731.20
  6. Step 6: Final answer
    x = 1,785,948.05

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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.