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Finding the Fourth Proportional to 342,016.80, 513,025.20 and 128,784.30

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Solution

The fourth proportional to 342,016.80, 513,025.20 and 128,784.30 is: 193,176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,016.80 : 513,025.20 = 128,784.30 : x
  2. Step 2: Convert to fraction form
    342,016.80/513,025.20 = 128,784.30/x
  3. Step 3: Cross multiply
    342,016.80x = 513,025.20 × 128,784.30
  4. Step 4: Simplify right side
    342,016.80x = 66,069,591,264.36
  5. Step 5: Solve for x
    x = 66,069,591,264.36/342,016.80
  6. Step 6: Final answer
    x = 193,176.45

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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.