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Finding the Fourth Proportional to 315,429.59, 435,290.56 and 172,189.60

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Solution

The fourth proportional to 315,429.59, 435,290.56 and 172,189.60 is: 237,620.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,429.59 : 435,290.56 = 172,189.60 : x
  2. Step 2: Convert to fraction form
    315,429.59/435,290.56 = 172,189.60/x
  3. Step 3: Cross multiply
    315,429.59x = 435,290.56 × 172,189.60
  4. Step 4: Simplify right side
    315,429.59x = 74,952,505,891.48
  5. Step 5: Solve for x
    x = 74,952,505,891.48/315,429.59
  6. Step 6: Final answer
    x = 237,620.40

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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.