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Finding the Fourth Proportional to 916.48, 1,374.70 and 300.22

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Solution

The fourth proportional to 916.48, 1,374.70 and 300.22 is: 450.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.48 : 1,374.70 = 300.22 : x
  2. Step 2: Convert to fraction form
    916.48/1,374.70 = 300.22/x
  3. Step 3: Cross multiply
    916.48x = 1,374.70 × 300.22
  4. Step 4: Simplify right side
    916.48x = 412,712.43
  5. Step 5: Solve for x
    x = 412,712.43/916.48
  6. Step 6: Final answer
    x = 450.32

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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.