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Finding the Fourth Proportional to 219,215.40, 328,823.10 and 217,141.80

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Solution

The fourth proportional to 219,215.40, 328,823.10 and 217,141.80 is: 325,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,215.40 : 328,823.10 = 217,141.80 : x
  2. Step 2: Convert to fraction form
    219,215.40/328,823.10 = 217,141.80/x
  3. Step 3: Cross multiply
    219,215.40x = 328,823.10 × 217,141.80
  4. Step 4: Simplify right side
    219,215.40x = 71,401,239,815.58
  5. Step 5: Solve for x
    x = 71,401,239,815.58/219,215.40
  6. Step 6: Final answer
    x = 325,712.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.