Home / 720,531.80-1,081,412.10-321,786.20

Finding the Fourth Proportional to 720,531.80, 1,081,412.10 and 321,786.20

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Solution

The fourth proportional to 720,531.80, 1,081,412.10 and 321,786.20 is: 482,953.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,531.80 : 1,081,412.10 = 321,786.20 : x
  2. Step 2: Convert to fraction form
    720,531.80/1,081,412.10 = 321,786.20/x
  3. Step 3: Cross multiply
    720,531.80x = 1,081,412.10 × 321,786.20
  4. Step 4: Simplify right side
    720,531.80x = 347,983,490,293.02
  5. Step 5: Solve for x
    x = 347,983,490,293.02/720,531.80
  6. Step 6: Final answer
    x = 482,953.69

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1.5x scale

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.