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Finding the Fourth Proportional to 1,333.65, 2,000.76 and 409.28

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Solution

The fourth proportional to 1,333.65, 2,000.76 and 409.28 is: 614.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.65 : 2,000.76 = 409.28 : x
  2. Step 2: Convert to fraction form
    1,333.65/2,000.76 = 409.28/x
  3. Step 3: Cross multiply
    1,333.65x = 2,000.76 × 409.28
  4. Step 4: Simplify right side
    1,333.65x = 818,861.05
  5. Step 5: Solve for x
    x = 818,861.05/1,333.65
  6. Step 6: Final answer
    x = 614.00

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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.