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Finding the Fourth Proportional to 1,332.99, 1,999.80 and 511.29

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Solution

The fourth proportional to 1,332.99, 1,999.80 and 511.29 is: 767.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.99 : 1,999.80 = 511.29 : x
  2. Step 2: Convert to fraction form
    1,332.99/1,999.80 = 511.29/x
  3. Step 3: Cross multiply
    1,332.99x = 1,999.80 × 511.29
  4. Step 4: Simplify right side
    1,332.99x = 1,022,477.74
  5. Step 5: Solve for x
    x = 1,022,477.74/1,332.99
  6. Step 6: Final answer
    x = 767.06

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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.