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Finding the Fourth Proportional to 219,210.40, 328,459.20 and 198,215.20

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Solution

The fourth proportional to 219,210.40, 328,459.20 and 198,215.20 is: 297,000.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,210.40 : 328,459.20 = 198,215.20 : x
  2. Step 2: Convert to fraction form
    219,210.40/328,459.20 = 198,215.20/x
  3. Step 3: Cross multiply
    219,210.40x = 328,459.20 × 198,215.20
  4. Step 4: Simplify right side
    219,210.40x = 65,105,606,019.84
  5. Step 5: Solve for x
    x = 65,105,606,019.84/219,210.40
  6. Step 6: Final answer
    x = 297,000.53

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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.