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Finding the Fourth Proportional to 315,191.60, 434,955.78 and 171,951.61

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Solution

The fourth proportional to 315,191.60, 434,955.78 and 171,951.61 is: 237,288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,191.60 : 434,955.78 = 171,951.61 : x
  2. Step 2: Convert to fraction form
    315,191.60/434,955.78 = 171,951.61/x
  3. Step 3: Cross multiply
    315,191.60x = 434,955.78 × 171,951.61
  4. Step 4: Simplify right side
    315,191.60x = 74,791,346,649.81
  5. Step 5: Solve for x
    x = 74,791,346,649.81/315,191.60
  6. Step 6: Final answer
    x = 237,288.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.