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Finding the Fourth Proportional to 898.04, 1,237.47 and 688.22

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Solution

The fourth proportional to 898.04, 1,237.47 and 688.22 is: 948.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.04 : 1,237.47 = 688.22 : x
  2. Step 2: Convert to fraction form
    898.04/1,237.47 = 688.22/x
  3. Step 3: Cross multiply
    898.04x = 1,237.47 × 688.22
  4. Step 4: Simplify right side
    898.04x = 851,651.60
  5. Step 5: Solve for x
    x = 851,651.60/898.04
  6. Step 6: Final answer
    x = 948.34

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Double scale
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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.