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Finding the Fourth Proportional to 945.33, 1,416.55 and 397.21

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Solution

The fourth proportional to 945.33, 1,416.55 and 397.21 is: 595.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.33 : 1,416.55 = 397.21 : x
  2. Step 2: Convert to fraction form
    945.33/1,416.55 = 397.21/x
  3. Step 3: Cross multiply
    945.33x = 1,416.55 × 397.21
  4. Step 4: Simplify right side
    945.33x = 562,667.83
  5. Step 5: Solve for x
    x = 562,667.83/945.33
  6. Step 6: Final answer
    x = 595.21

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Double scale
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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.