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Finding the Fourth Proportional to 945.07, 1,416.05 and 749.79

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Solution

The fourth proportional to 945.07, 1,416.05 and 749.79 is: 1,123.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.07 : 1,416.05 = 749.79 : x
  2. Step 2: Convert to fraction form
    945.07/1,416.05 = 749.79/x
  3. Step 3: Cross multiply
    945.07x = 1,416.05 × 749.79
  4. Step 4: Simplify right side
    945.07x = 1,061,739.19
  5. Step 5: Solve for x
    x = 1,061,739.19/945.07
  6. Step 6: Final answer
    x = 1,123.45

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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.