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Finding the Fourth Proportional to 1,135.21, 1,566.39 and 637.87

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Solution

The fourth proportional to 1,135.21, 1,566.39 and 637.87 is: 880.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.21 : 1,566.39 = 637.87 : x
  2. Step 2: Convert to fraction form
    1,135.21/1,566.39 = 637.87/x
  3. Step 3: Cross multiply
    1,135.21x = 1,566.39 × 637.87
  4. Step 4: Simplify right side
    1,135.21x = 999,153.19
  5. Step 5: Solve for x
    x = 999,153.19/1,135.21
  6. Step 6: Final answer
    x = 880.15

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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.