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Finding the Fourth Proportional to 1,135.02, 1,566.08 and 669

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Solution

The fourth proportional to 1,135.02, 1,566.08 and 669 is: 923.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.02 : 1,566.08 = 669 : x
  2. Step 2: Convert to fraction form
    1,135.02/1,566.08 = 669/x
  3. Step 3: Cross multiply
    1,135.02x = 1,566.08 × 669
  4. Step 4: Simplify right side
    1,135.02x = 1,047,707.52
  5. Step 5: Solve for x
    x = 1,047,707.52/1,135.02
  6. Step 6: Final answer
    x = 923.07

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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.