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Finding the Fourth Proportional to 554.37, 831.56 and 143.51

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Solution

The fourth proportional to 554.37, 831.56 and 143.51 is: 215.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.37 : 831.56 = 143.51 : x
  2. Step 2: Convert to fraction form
    554.37/831.56 = 143.51/x
  3. Step 3: Cross multiply
    554.37x = 831.56 × 143.51
  4. Step 4: Simplify right side
    554.37x = 119,338.54
  5. Step 5: Solve for x
    x = 119,338.54/554.37
  6. Step 6: Final answer
    x = 215.27

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.