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Finding the Fourth Proportional to 896.91, 1,237.74 and 498.60

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Solution

The fourth proportional to 896.91, 1,237.74 and 498.60 is: 688.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.91 : 1,237.74 = 498.60 : x
  2. Step 2: Convert to fraction form
    896.91/1,237.74 = 498.60/x
  3. Step 3: Cross multiply
    896.91x = 1,237.74 × 498.60
  4. Step 4: Simplify right side
    896.91x = 617,137.16
  5. Step 5: Solve for x
    x = 617,137.16/896.91
  6. Step 6: Final answer
    x = 688.07

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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.