Home / 1,137.61-1,569.90-640.23

Finding the Fourth Proportional to 1,137.61, 1,569.90 and 640.23

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Solution

The fourth proportional to 1,137.61, 1,569.90 and 640.23 is: 883.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.61 : 1,569.90 = 640.23 : x
  2. Step 2: Convert to fraction form
    1,137.61/1,569.90 = 640.23/x
  3. Step 3: Cross multiply
    1,137.61x = 1,569.90 × 640.23
  4. Step 4: Simplify right side
    1,137.61x = 1,005,097.08
  5. Step 5: Solve for x
    x = 1,005,097.08/1,137.61
  6. Step 6: Final answer
    x = 883.52

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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.