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Finding the Fourth Proportional to 1,131.03, 1,695.74 and 554.31

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Solution

The fourth proportional to 1,131.03, 1,695.74 and 554.31 is: 831.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.03 : 1,695.74 = 554.31 : x
  2. Step 2: Convert to fraction form
    1,131.03/1,695.74 = 554.31/x
  3. Step 3: Cross multiply
    1,131.03x = 1,695.74 × 554.31
  4. Step 4: Simplify right side
    1,131.03x = 939,962.87
  5. Step 5: Solve for x
    x = 939,962.87/1,131.03
  6. Step 6: Final answer
    x = 831.07

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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.