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Finding the Fourth Proportional to 220,628.10, 328,447.19 and 219,315.90

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Solution

The fourth proportional to 220,628.10, 328,447.19 and 219,315.90 is: 326,493.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,628.10 : 328,447.19 = 219,315.90 : x
  2. Step 2: Convert to fraction form
    220,628.10/328,447.19 = 219,315.90/x
  3. Step 3: Cross multiply
    220,628.10x = 328,447.19 × 219,315.90
  4. Step 4: Simplify right side
    220,628.10x = 72,033,689,980.74
  5. Step 5: Solve for x
    x = 72,033,689,980.74/220,628.10
  6. Step 6: Final answer
    x = 326,493.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.