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Finding the Fourth Proportional to 317,965.70, 438,354.23 and 253,653.22

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Solution

The fourth proportional to 317,965.70, 438,354.23 and 253,653.22 is: 349,691.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,965.70 : 438,354.23 = 253,653.22 : x
  2. Step 2: Convert to fraction form
    317,965.70/438,354.23 = 253,653.22/x
  3. Step 3: Cross multiply
    317,965.70x = 438,354.23 × 253,653.22
  4. Step 4: Simplify right side
    317,965.70x = 111,189,962,646.60
  5. Step 5: Solve for x
    x = 111,189,962,646.60/317,965.70
  6. Step 6: Final answer
    x = 349,691.69

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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.