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Finding the Fourth Proportional to 381,964.62, 570,143.18 and 353,815.50

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Solution

The fourth proportional to 381,964.62, 570,143.18 and 353,815.50 is: 528,126.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,964.62 : 570,143.18 = 353,815.50 : x
  2. Step 2: Convert to fraction form
    381,964.62/570,143.18 = 353,815.50/x
  3. Step 3: Cross multiply
    381,964.62x = 570,143.18 × 353,815.50
  4. Step 4: Simplify right side
    381,964.62x = 201,725,492,534.21
  5. Step 5: Solve for x
    x = 201,725,492,534.21/381,964.62
  6. Step 6: Final answer
    x = 528,126.12

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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.