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Finding the Fourth Proportional to 1,126.07, 1,554.63 and 858.41

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Solution

The fourth proportional to 1,126.07, 1,554.63 and 858.41 is: 1,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.07 : 1,554.63 = 858.41 : x
  2. Step 2: Convert to fraction form
    1,126.07/1,554.63 = 858.41/x
  3. Step 3: Cross multiply
    1,126.07x = 1,554.63 × 858.41
  4. Step 4: Simplify right side
    1,126.07x = 1,334,510.61
  5. Step 5: Solve for x
    x = 1,334,510.61/1,126.07
  6. Step 6: Final answer
    x = 1,185.10

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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.