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Finding the Fourth Proportional to 897.54, 1,238.22 and 618.14

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Solution

The fourth proportional to 897.54, 1,238.22 and 618.14 is: 852.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.54 : 1,238.22 = 618.14 : x
  2. Step 2: Convert to fraction form
    897.54/1,238.22 = 618.14/x
  3. Step 3: Cross multiply
    897.54x = 1,238.22 × 618.14
  4. Step 4: Simplify right side
    897.54x = 765,393.31
  5. Step 5: Solve for x
    x = 765,393.31/897.54
  6. Step 6: Final answer
    x = 852.77

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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.