Home / 1,288.22-1,931.32-557.30

Finding the Fourth Proportional to 1,288.22, 1,931.32 and 557.30

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Solution

The fourth proportional to 1,288.22, 1,931.32 and 557.30 is: 835.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.22 : 1,931.32 = 557.30 : x
  2. Step 2: Convert to fraction form
    1,288.22/1,931.32 = 557.30/x
  3. Step 3: Cross multiply
    1,288.22x = 1,931.32 × 557.30
  4. Step 4: Simplify right side
    1,288.22x = 1,076,324.64
  5. Step 5: Solve for x
    x = 1,076,324.64/1,288.22
  6. Step 6: Final answer
    x = 835.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.