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Finding the Fourth Proportional to 914.85, 1,372.10 and 298.37

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Solution

The fourth proportional to 914.85, 1,372.10 and 298.37 is: 447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.85 : 1,372.10 = 298.37 : x
  2. Step 2: Convert to fraction form
    914.85/1,372.10 = 298.37/x
  3. Step 3: Cross multiply
    914.85x = 1,372.10 × 298.37
  4. Step 4: Simplify right side
    914.85x = 409,393.48
  5. Step 5: Solve for x
    x = 409,393.48/914.85
  6. Step 6: Final answer
    x = 447.50

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Double scale
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1.5x scale

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.