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Finding the Fourth Proportional to 454,407.20, 681,643.20 and 138,863.60

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Solution

The fourth proportional to 454,407.20, 681,643.20 and 138,863.60 is: 208,305.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,407.20 : 681,643.20 = 138,863.60 : x
  2. Step 2: Convert to fraction form
    454,407.20/681,643.20 = 138,863.60/x
  3. Step 3: Cross multiply
    454,407.20x = 681,643.20 × 138,863.60
  4. Step 4: Simplify right side
    454,407.20x = 94,655,428,667.52
  5. Step 5: Solve for x
    x = 94,655,428,667.52/454,407.20
  6. Step 6: Final answer
    x = 208,305.30

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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.