Home / 921,739.26-1,272,005.46-513,867

Finding the Fourth Proportional to 921,739.26, 1,272,005.46 and 513,867

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Solution

The fourth proportional to 921,739.26, 1,272,005.46 and 513,867 is: 709,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,739.26 : 1,272,005.46 = 513,867 : x
  2. Step 2: Convert to fraction form
    921,739.26/1,272,005.46 = 513,867/x
  3. Step 3: Cross multiply
    921,739.26x = 1,272,005.46 × 513,867
  4. Step 4: Simplify right side
    921,739.26x = 653,641,629,713.82
  5. Step 5: Solve for x
    x = 653,641,629,713.82/921,739.26
  6. Step 6: Final answer
    x = 709,139.40

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1.5x scale

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.