Home / 819,637.60-1,228,144.20-519,581.20

Finding the Fourth Proportional to 819,637.60, 1,228,144.20 and 519,581.20

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Solution

The fourth proportional to 819,637.60, 1,228,144.20 and 519,581.20 is: 778,539.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,637.60 : 1,228,144.20 = 519,581.20 : x
  2. Step 2: Convert to fraction form
    819,637.60/1,228,144.20 = 519,581.20/x
  3. Step 3: Cross multiply
    819,637.60x = 1,228,144.20 × 519,581.20
  4. Step 4: Simplify right side
    819,637.60x = 638,120,637,209.04
  5. Step 5: Solve for x
    x = 638,120,637,209.04/819,637.60
  6. Step 6: Final answer
    x = 778,539.98

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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.