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Finding the Fourth Proportional to 945.09, 1,416.83 and 457.47

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Solution

The fourth proportional to 945.09, 1,416.83 and 457.47 is: 685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.09 : 1,416.83 = 457.47 : x
  2. Step 2: Convert to fraction form
    945.09/1,416.83 = 457.47/x
  3. Step 3: Cross multiply
    945.09x = 1,416.83 × 457.47
  4. Step 4: Simplify right side
    945.09x = 648,154.93
  5. Step 5: Solve for x
    x = 648,154.93/945.09
  6. Step 6: Final answer
    x = 685.81

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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.