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Finding the Fourth Proportional to 1,089.19, 1,503.08 and 623.44

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Solution

The fourth proportional to 1,089.19, 1,503.08 and 623.44 is: 860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.19 : 1,503.08 = 623.44 : x
  2. Step 2: Convert to fraction form
    1,089.19/1,503.08 = 623.44/x
  3. Step 3: Cross multiply
    1,089.19x = 1,503.08 × 623.44
  4. Step 4: Simplify right side
    1,089.19x = 937,078.00
  5. Step 5: Solve for x
    x = 937,078.00/1,089.19
  6. Step 6: Final answer
    x = 860.35

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1.5x scale

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.