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Finding the Fourth Proportional to 947.25, 1,307.21 and 554.54

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Solution

The fourth proportional to 947.25, 1,307.21 and 554.54 is: 765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.25 : 1,307.21 = 554.54 : x
  2. Step 2: Convert to fraction form
    947.25/1,307.21 = 554.54/x
  3. Step 3: Cross multiply
    947.25x = 1,307.21 × 554.54
  4. Step 4: Simplify right side
    947.25x = 724,900.23
  5. Step 5: Solve for x
    x = 724,900.23/947.25
  6. Step 6: Final answer
    x = 765.27

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.