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Finding the Fourth Proportional to 947.07, 1,306.90 and 554.07

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Solution

The fourth proportional to 947.07, 1,306.90 and 554.07 is: 764.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.07 : 1,306.90 = 554.07 : x
  2. Step 2: Convert to fraction form
    947.07/1,306.90 = 554.07/x
  3. Step 3: Cross multiply
    947.07x = 1,306.90 × 554.07
  4. Step 4: Simplify right side
    947.07x = 724,104.78
  5. Step 5: Solve for x
    x = 724,104.78/947.07
  6. Step 6: Final answer
    x = 764.58

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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.