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Finding the Fourth Proportional to 317,565.56, 438,245.61 and 172,374.23

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Solution

The fourth proportional to 317,565.56, 438,245.61 and 172,374.23 is: 237,879.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,565.56 : 438,245.61 = 172,374.23 : x
  2. Step 2: Convert to fraction form
    317,565.56/438,245.61 = 172,374.23/x
  3. Step 3: Cross multiply
    317,565.56x = 438,245.61 × 172,374.23
  4. Step 4: Simplify right side
    317,565.56x = 75,542,249,013.12
  5. Step 5: Solve for x
    x = 75,542,249,013.12/317,565.56
  6. Step 6: Final answer
    x = 237,879.22

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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.