Home / 847,987.20-1,170,218.40-485,409

Finding the Fourth Proportional to 847,987.20, 1,170,218.40 and 485,409

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Solution

The fourth proportional to 847,987.20, 1,170,218.40 and 485,409 is: 669,862.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,987.20 : 1,170,218.40 = 485,409 : x
  2. Step 2: Convert to fraction form
    847,987.20/1,170,218.40 = 485,409/x
  3. Step 3: Cross multiply
    847,987.20x = 1,170,218.40 × 485,409
  4. Step 4: Simplify right side
    847,987.20x = 568,034,543,325.60
  5. Step 5: Solve for x
    x = 568,034,543,325.60/847,987.20
  6. Step 6: Final answer
    x = 669,862.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.