Home / 1,137.42-1,569.50-640.08

Finding the Fourth Proportional to 1,137.42, 1,569.50 and 640.08

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Solution

The fourth proportional to 1,137.42, 1,569.50 and 640.08 is: 883.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.42 : 1,569.50 = 640.08 : x
  2. Step 2: Convert to fraction form
    1,137.42/1,569.50 = 640.08/x
  3. Step 3: Cross multiply
    1,137.42x = 1,569.50 × 640.08
  4. Step 4: Simplify right side
    1,137.42x = 1,004,605.56
  5. Step 5: Solve for x
    x = 1,004,605.56/1,137.42
  6. Step 6: Final answer
    x = 883.23

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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.