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Finding the Fourth Proportional to 897.29, 1,238.26 and 498.95

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Solution

The fourth proportional to 897.29, 1,238.26 and 498.95 is: 688.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.29 : 1,238.26 = 498.95 : x
  2. Step 2: Convert to fraction form
    897.29/1,238.26 = 498.95/x
  3. Step 3: Cross multiply
    897.29x = 1,238.26 × 498.95
  4. Step 4: Simplify right side
    897.29x = 617,831.68
  5. Step 5: Solve for x
    x = 617,831.68/897.29
  6. Step 6: Final answer
    x = 688.56

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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.