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Finding the Fourth Proportional to 1,133.99, 1,564.96 and 661.82

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Solution

The fourth proportional to 1,133.99, 1,564.96 and 661.82 is: 913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.99 : 1,564.96 = 661.82 : x
  2. Step 2: Convert to fraction form
    1,133.99/1,564.96 = 661.82/x
  3. Step 3: Cross multiply
    1,133.99x = 1,564.96 × 661.82
  4. Step 4: Simplify right side
    1,133.99x = 1,035,712.35
  5. Step 5: Solve for x
    x = 1,035,712.35/1,133.99
  6. Step 6: Final answer
    x = 913.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.