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Finding the Fourth Proportional to 315,759.84, 435,743.43 and 172,516.80

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Solution

The fourth proportional to 315,759.84, 435,743.43 and 172,516.80 is: 238,070.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,759.84 : 435,743.43 = 172,516.80 : x
  2. Step 2: Convert to fraction form
    315,759.84/435,743.43 = 172,516.80/x
  3. Step 3: Cross multiply
    315,759.84x = 435,743.43 × 172,516.80
  4. Step 4: Simplify right side
    315,759.84x = 75,173,062,164.62
  5. Step 5: Solve for x
    x = 75,173,062,164.62/315,759.84
  6. Step 6: Final answer
    x = 238,070.37

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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.