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Finding the Fourth Proportional to 898.30, 1,347.01 and 313.28

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Solution

The fourth proportional to 898.30, 1,347.01 and 313.28 is: 469.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.30 : 1,347.01 = 313.28 : x
  2. Step 2: Convert to fraction form
    898.30/1,347.01 = 313.28/x
  3. Step 3: Cross multiply
    898.30x = 1,347.01 × 313.28
  4. Step 4: Simplify right side
    898.30x = 421,989.73
  5. Step 5: Solve for x
    x = 421,989.73/898.30
  6. Step 6: Final answer
    x = 469.77

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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.