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Finding the Fourth Proportional to 1,089.37, 1,503.39 and 623.62

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Solution

The fourth proportional to 1,089.37, 1,503.39 and 623.62 is: 860.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.37 : 1,503.39 = 623.62 : x
  2. Step 2: Convert to fraction form
    1,089.37/1,503.39 = 623.62/x
  3. Step 3: Cross multiply
    1,089.37x = 1,503.39 × 623.62
  4. Step 4: Simplify right side
    1,089.37x = 937,544.07
  5. Step 5: Solve for x
    x = 937,544.07/1,089.37
  6. Step 6: Final answer
    x = 860.63

Related Problems

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Double scale
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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.