Home / 991,079.10-1,486,618.68-430,113.60

Finding the Fourth Proportional to 991,079.10, 1,486,618.68 and 430,113.60

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Solution

The fourth proportional to 991,079.10, 1,486,618.68 and 430,113.60 is: 645,170.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,079.10 : 1,486,618.68 = 430,113.60 : x
  2. Step 2: Convert to fraction form
    991,079.10/1,486,618.68 = 430,113.60/x
  3. Step 3: Cross multiply
    991,079.10x = 1,486,618.68 × 430,113.60
  4. Step 4: Simplify right side
    991,079.10x = 639,414,912,282.05
  5. Step 5: Solve for x
    x = 639,414,912,282.05/991,079.10
  6. Step 6: Final answer
    x = 645,170.41

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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.