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Finding the Fourth Proportional to 317,401.89, 438,014.54 and 181,438.79

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Solution

The fourth proportional to 317,401.89, 438,014.54 and 181,438.79 is: 250,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,401.89 : 438,014.54 = 181,438.79 : x
  2. Step 2: Convert to fraction form
    317,401.89/438,014.54 = 181,438.79/x
  3. Step 3: Cross multiply
    317,401.89x = 438,014.54 × 181,438.79
  4. Step 4: Simplify right side
    317,401.89x = 79,472,825,382.94
  5. Step 5: Solve for x
    x = 79,472,825,382.94/317,401.89
  6. Step 6: Final answer
    x = 250,385.48

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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.