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Finding the Fourth Proportional to 898.34, 1,347.12 and 313.24

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Solution

The fourth proportional to 898.34, 1,347.12 and 313.24 is: 469.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.34 : 1,347.12 = 313.24 : x
  2. Step 2: Convert to fraction form
    898.34/1,347.12 = 313.24/x
  3. Step 3: Cross multiply
    898.34x = 1,347.12 × 313.24
  4. Step 4: Simplify right side
    898.34x = 421,971.87
  5. Step 5: Solve for x
    x = 421,971.87/898.34
  6. Step 6: Final answer
    x = 469.72

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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.