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Finding the Fourth Proportional to 454,409.20, 681,646.20 and 138,865.60

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Solution

The fourth proportional to 454,409.20, 681,646.20 and 138,865.60 is: 208,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,409.20 : 681,646.20 = 138,865.60 : x
  2. Step 2: Convert to fraction form
    454,409.20/681,646.20 = 138,865.60/x
  3. Step 3: Cross multiply
    454,409.20x = 681,646.20 × 138,865.60
  4. Step 4: Simplify right side
    454,409.20x = 94,657,208,550.72
  5. Step 5: Solve for x
    x = 94,657,208,550.72/454,409.20
  6. Step 6: Final answer
    x = 208,308.30

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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.