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Finding the Fourth Proportional to 317,421.40, 438,020.10 and 174,190.62

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Solution

The fourth proportional to 317,421.40, 438,020.10 and 174,190.62 is: 240,371.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,421.40 : 438,020.10 = 174,190.62 : x
  2. Step 2: Convert to fraction form
    317,421.40/438,020.10 = 174,190.62/x
  3. Step 3: Cross multiply
    317,421.40x = 438,020.10 × 174,190.62
  4. Step 4: Simplify right side
    317,421.40x = 76,298,992,791.46
  5. Step 5: Solve for x
    x = 76,298,992,791.46/317,421.40
  6. Step 6: Final answer
    x = 240,371.29

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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.