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Finding the Fourth Proportional to 315,633.62, 435,574.40 and 172,394.00

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Solution

The fourth proportional to 315,633.62, 435,574.40 and 172,394.00 is: 237,903.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,633.62 : 435,574.40 = 172,394.00 : x
  2. Step 2: Convert to fraction form
    315,633.62/435,574.40 = 172,394.00/x
  3. Step 3: Cross multiply
    315,633.62x = 435,574.40 × 172,394.00
  4. Step 4: Simplify right side
    315,633.62x = 75,090,414,157.27
  5. Step 5: Solve for x
    x = 75,090,414,157.27/315,633.62
  6. Step 6: Final answer
    x = 237,903.72

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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.