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Finding the Fourth Proportional to 317,684.51, 438,402.65 and 181,720.73

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Solution

The fourth proportional to 317,684.51, 438,402.65 and 181,720.73 is: 250,773.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,684.51 : 438,402.65 = 181,720.73 : x
  2. Step 2: Convert to fraction form
    317,684.51/438,402.65 = 181,720.73/x
  3. Step 3: Cross multiply
    317,684.51x = 438,402.65 × 181,720.73
  4. Step 4: Simplify right side
    317,684.51x = 79,666,846,491.32
  5. Step 5: Solve for x
    x = 79,666,846,491.32/317,684.51
  6. Step 6: Final answer
    x = 250,773.47

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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.