Home / 819,720.80-1,131,212.46-457,145.04

Finding the Fourth Proportional to 819,720.80, 1,131,212.46 and 457,145.04

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Solution

The fourth proportional to 819,720.80, 1,131,212.46 and 457,145.04 is: 630,858.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,720.80 : 1,131,212.46 = 457,145.04 : x
  2. Step 2: Convert to fraction form
    819,720.80/1,131,212.46 = 457,145.04/x
  3. Step 3: Cross multiply
    819,720.80x = 1,131,212.46 × 457,145.04
  4. Step 4: Simplify right side
    819,720.80x = 517,128,165,275.20
  5. Step 5: Solve for x
    x = 517,128,165,275.20/819,720.80
  6. Step 6: Final answer
    x = 630,858.90

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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.