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Finding the Fourth Proportional to 947.14, 1,307.40 and 554.48

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Solution

The fourth proportional to 947.14, 1,307.40 and 554.48 is: 765.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.14 : 1,307.40 = 554.48 : x
  2. Step 2: Convert to fraction form
    947.14/1,307.40 = 554.48/x
  3. Step 3: Cross multiply
    947.14x = 1,307.40 × 554.48
  4. Step 4: Simplify right side
    947.14x = 724,927.15
  5. Step 5: Solve for x
    x = 724,927.15/947.14
  6. Step 6: Final answer
    x = 765.39

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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.