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Finding the Fourth Proportional to 315,634.08, 435,567.99 and 172,394.64

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Solution

The fourth proportional to 315,634.08, 435,567.99 and 172,394.64 is: 237,900.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,634.08 : 435,567.99 = 172,394.64 : x
  2. Step 2: Convert to fraction form
    315,634.08/435,567.99 = 172,394.64/x
  3. Step 3: Cross multiply
    315,634.08x = 435,567.99 × 172,394.64
  4. Step 4: Simplify right side
    315,634.08x = 75,089,586,831.57
  5. Step 5: Solve for x
    x = 75,089,586,831.57/315,634.08
  6. Step 6: Final answer
    x = 237,900.76

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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.