Home / 1,137.64-1,569.95-640.27

Finding the Fourth Proportional to 1,137.64, 1,569.95 and 640.27

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Solution

The fourth proportional to 1,137.64, 1,569.95 and 640.27 is: 883.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.64 : 1,569.95 = 640.27 : x
  2. Step 2: Convert to fraction form
    1,137.64/1,569.95 = 640.27/x
  3. Step 3: Cross multiply
    1,137.64x = 1,569.95 × 640.27
  4. Step 4: Simplify right side
    1,137.64x = 1,005,191.89
  5. Step 5: Solve for x
    x = 1,005,191.89/1,137.64
  6. Step 6: Final answer
    x = 883.58

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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.