Home / 819,720.20-1,228,268.10-538,909.40

Finding the Fourth Proportional to 819,720.20, 1,228,268.10 and 538,909.40

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Solution

The fourth proportional to 819,720.20, 1,228,268.10 and 538,909.40 is: 807,501.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,720.20 : 1,228,268.10 = 538,909.40 : x
  2. Step 2: Convert to fraction form
    819,720.20/1,228,268.10 = 538,909.40/x
  3. Step 3: Cross multiply
    819,720.20x = 1,228,268.10 × 538,909.40
  4. Step 4: Simplify right side
    819,720.20x = 661,925,224,810.14
  5. Step 5: Solve for x
    x = 661,925,224,810.14/819,720.20
  6. Step 6: Final answer
    x = 807,501.42

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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.