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Finding the Fourth Proportional to 945.94, 1,418.86 and 457.51

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Solution

The fourth proportional to 945.94, 1,418.86 and 457.51 is: 686.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.94 : 1,418.86 = 457.51 : x
  2. Step 2: Convert to fraction form
    945.94/1,418.86 = 457.51/x
  3. Step 3: Cross multiply
    945.94x = 1,418.86 × 457.51
  4. Step 4: Simplify right side
    945.94x = 649,142.64
  5. Step 5: Solve for x
    x = 649,142.64/945.94
  6. Step 6: Final answer
    x = 686.24

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Double scale
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1.5x scale

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.