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Finding the Fourth Proportional to 1,089.53, 1,503.52 and 623.75

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Solution

The fourth proportional to 1,089.53, 1,503.52 and 623.75 is: 860.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.53 : 1,503.52 = 623.75 : x
  2. Step 2: Convert to fraction form
    1,089.53/1,503.52 = 623.75/x
  3. Step 3: Cross multiply
    1,089.53x = 1,503.52 × 623.75
  4. Step 4: Simplify right side
    1,089.53x = 937,820.60
  5. Step 5: Solve for x
    x = 937,820.60/1,089.53
  6. Step 6: Final answer
    x = 860.76

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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.