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Finding the Fourth Proportional to 897.54, 1,236.86 and 648.38

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Solution

The fourth proportional to 897.54, 1,236.86 and 648.38 is: 893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.54 : 1,236.86 = 648.38 : x
  2. Step 2: Convert to fraction form
    897.54/1,236.86 = 648.38/x
  3. Step 3: Cross multiply
    897.54x = 1,236.86 × 648.38
  4. Step 4: Simplify right side
    897.54x = 801,955.29
  5. Step 5: Solve for x
    x = 801,955.29/897.54
  6. Step 6: Final answer
    x = 893.50

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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.