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Finding the Fourth Proportional to 1,685.00, 2,325.07 and 938.89

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Solution

The fourth proportional to 1,685.00, 2,325.07 and 938.89 is: 1,295.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.00 : 2,325.07 = 938.89 : x
  2. Step 2: Convert to fraction form
    1,685.00/2,325.07 = 938.89/x
  3. Step 3: Cross multiply
    1,685.00x = 2,325.07 × 938.89
  4. Step 4: Simplify right side
    1,685.00x = 2,182,989.05
  5. Step 5: Solve for x
    x = 2,182,989.05/1,685.00
  6. Step 6: Final answer
    x = 1,295.54

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Half scale
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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.