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Finding the Fourth Proportional to 358,768.80, 537,116.40 and 218,800.80

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Solution

The fourth proportional to 358,768.80, 537,116.40 and 218,800.80 is: 327,568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,768.80 : 537,116.40 = 218,800.80 : x
  2. Step 2: Convert to fraction form
    358,768.80/537,116.40 = 218,800.80/x
  3. Step 3: Cross multiply
    358,768.80x = 537,116.40 × 218,800.80
  4. Step 4: Simplify right side
    358,768.80x = 117,521,498,013.12
  5. Step 5: Solve for x
    x = 117,521,498,013.12/358,768.80
  6. Step 6: Final answer
    x = 327,568.89

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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.