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Finding the Fourth Proportional to 1,126.46, 1,554.43 and 629.00

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Solution

The fourth proportional to 1,126.46, 1,554.43 and 629.00 is: 867.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.46 : 1,554.43 = 629.00 : x
  2. Step 2: Convert to fraction form
    1,126.46/1,554.43 = 629.00/x
  3. Step 3: Cross multiply
    1,126.46x = 1,554.43 × 629.00
  4. Step 4: Simplify right side
    1,126.46x = 977,740.36
  5. Step 5: Solve for x
    x = 977,740.36/1,126.46
  6. Step 6: Final answer
    x = 867.98

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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.