Home / 813,643.20-1,220,464.80-515,044.80

Finding the Fourth Proportional to 813,643.20, 1,220,464.80 and 515,044.80

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Solution

The fourth proportional to 813,643.20, 1,220,464.80 and 515,044.80 is: 772,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,643.20 : 1,220,464.80 = 515,044.80 : x
  2. Step 2: Convert to fraction form
    813,643.20/1,220,464.80 = 515,044.80/x
  3. Step 3: Cross multiply
    813,643.20x = 1,220,464.80 × 515,044.80
  4. Step 4: Simplify right side
    813,643.20x = 628,594,048,823.04
  5. Step 5: Solve for x
    x = 628,594,048,823.04/813,643.20
  6. Step 6: Final answer
    x = 772,567.20

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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.