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Finding the Fourth Proportional to 315,759.87, 435,754.89 and 172,528.80

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Solution

The fourth proportional to 315,759.87, 435,754.89 and 172,528.80 is: 238,093.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,759.87 : 435,754.89 = 172,528.80 : x
  2. Step 2: Convert to fraction form
    315,759.87/435,754.89 = 172,528.80/x
  3. Step 3: Cross multiply
    315,759.87x = 435,754.89 × 172,528.80
  4. Step 4: Simplify right side
    315,759.87x = 75,180,268,265.83
  5. Step 5: Solve for x
    x = 75,180,268,265.83/315,759.87
  6. Step 6: Final answer
    x = 238,093.17

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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.