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Finding the Fourth Proportional to 965.70, 1,447.56 and 417.42

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Solution

The fourth proportional to 965.70, 1,447.56 and 417.42 is: 625.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.70 : 1,447.56 = 417.42 : x
  2. Step 2: Convert to fraction form
    965.70/1,447.56 = 417.42/x
  3. Step 3: Cross multiply
    965.70x = 1,447.56 × 417.42
  4. Step 4: Simplify right side
    965.70x = 604,240.50
  5. Step 5: Solve for x
    x = 604,240.50/965.70
  6. Step 6: Final answer
    x = 625.70

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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.