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Finding the Fourth Proportional to 1,089.37, 1,502.88 and 617.14

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Solution

The fourth proportional to 1,089.37, 1,502.88 and 617.14 is: 851.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.37 : 1,502.88 = 617.14 : x
  2. Step 2: Convert to fraction form
    1,089.37/1,502.88 = 617.14/x
  3. Step 3: Cross multiply
    1,089.37x = 1,502.88 × 617.14
  4. Step 4: Simplify right side
    1,089.37x = 927,487.36
  5. Step 5: Solve for x
    x = 927,487.36/1,089.37
  6. Step 6: Final answer
    x = 851.40

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.