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Finding the Fourth Proportional to 315,641.60, 473,059.20 and 128,441.60

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Solution

The fourth proportional to 315,641.60, 473,059.20 and 128,441.60 is: 192,498.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,641.60 : 473,059.20 = 128,441.60 : x
  2. Step 2: Convert to fraction form
    315,641.60/473,059.20 = 128,441.60/x
  3. Step 3: Cross multiply
    315,641.60x = 473,059.20 × 128,441.60
  4. Step 4: Simplify right side
    315,641.60x = 60,760,480,542.72
  5. Step 5: Solve for x
    x = 60,760,480,542.72/315,641.60
  6. Step 6: Final answer
    x = 192,498.33

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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.