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Finding the Fourth Proportional to 1,089.03, 1,502.90 and 623.43

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Solution

The fourth proportional to 1,089.03, 1,502.90 and 623.43 is: 860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.03 : 1,502.90 = 623.43 : x
  2. Step 2: Convert to fraction form
    1,089.03/1,502.90 = 623.43/x
  3. Step 3: Cross multiply
    1,089.03x = 1,502.90 × 623.43
  4. Step 4: Simplify right side
    1,089.03x = 936,949.83
  5. Step 5: Solve for x
    x = 936,949.83/1,089.03
  6. Step 6: Final answer
    x = 860.35

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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.