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Finding the Fourth Proportional to 543,639.90, 815,396.46 and 144,311.70

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Solution

The fourth proportional to 543,639.90, 815,396.46 and 144,311.70 is: 216,450.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,639.90 : 815,396.46 = 144,311.70 : x
  2. Step 2: Convert to fraction form
    543,639.90/815,396.46 = 144,311.70/x
  3. Step 3: Cross multiply
    543,639.90x = 815,396.46 × 144,311.70
  4. Step 4: Simplify right side
    543,639.90x = 117,671,249,316.58
  5. Step 5: Solve for x
    x = 117,671,249,316.58/543,639.90
  6. Step 6: Final answer
    x = 216,450.72

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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.