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Finding the Fourth Proportional to 898.47, 1,346.79 and 681.59

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Solution

The fourth proportional to 898.47, 1,346.79 and 681.59 is: 1,021.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.47 : 1,346.79 = 681.59 : x
  2. Step 2: Convert to fraction form
    898.47/1,346.79 = 681.59/x
  3. Step 3: Cross multiply
    898.47x = 1,346.79 × 681.59
  4. Step 4: Simplify right side
    898.47x = 917,966.20
  5. Step 5: Solve for x
    x = 917,966.20/898.47
  6. Step 6: Final answer
    x = 1,021.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.