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Finding the Fourth Proportional to 257,480.40, 386,220.60 and 117,512.40

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Solution

The fourth proportional to 257,480.40, 386,220.60 and 117,512.40 is: 176,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,480.40 : 386,220.60 = 117,512.40 : x
  2. Step 2: Convert to fraction form
    257,480.40/386,220.60 = 117,512.40/x
  3. Step 3: Cross multiply
    257,480.40x = 386,220.60 × 117,512.40
  4. Step 4: Simplify right side
    257,480.40x = 45,385,709,635.44
  5. Step 5: Solve for x
    x = 45,385,709,635.44/257,480.40
  6. Step 6: Final answer
    x = 176,268.60

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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.