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Finding the Fourth Proportional to 317,396.88, 437,808.24 and 221,868.72

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Solution

The fourth proportional to 317,396.88, 437,808.24 and 221,868.72 is: 306,039.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,396.88 : 437,808.24 = 221,868.72 : x
  2. Step 2: Convert to fraction form
    317,396.88/437,808.24 = 221,868.72/x
  3. Step 3: Cross multiply
    317,396.88x = 437,808.24 × 221,868.72
  4. Step 4: Simplify right side
    317,396.88x = 97,135,953,814.25
  5. Step 5: Solve for x
    x = 97,135,953,814.25/317,396.88
  6. Step 6: Final answer
    x = 306,039.41

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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.