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Finding the Fourth Proportional to 656, 898.73 and 631.40

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Solution

The fourth proportional to 656, 898.73 and 631.40 is: 865.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    656 : 898.73 = 631.40 : x
  2. Step 2: Convert to fraction form
    656/898.73 = 631.40/x
  3. Step 3: Cross multiply
    656x = 898.73 × 631.40
  4. Step 4: Simplify right side
    656x = 567,458.12
  5. Step 5: Solve for x
    x = 567,458.12/656
  6. Step 6: Final answer
    x = 865.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.