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Finding the Fourth Proportional to 1,147.18, 1,583.07 and 623.21

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Solution

The fourth proportional to 1,147.18, 1,583.07 and 623.21 is: 860.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.18 : 1,583.07 = 623.21 : x
  2. Step 2: Convert to fraction form
    1,147.18/1,583.07 = 623.21/x
  3. Step 3: Cross multiply
    1,147.18x = 1,583.07 × 623.21
  4. Step 4: Simplify right side
    1,147.18x = 986,574.02
  5. Step 5: Solve for x
    x = 986,574.02/1,147.18
  6. Step 6: Final answer
    x = 860.00

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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.