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Finding the Fourth Proportional to 945.48, 1,418.58 and 425.46

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Solution

The fourth proportional to 945.48, 1,418.58 and 425.46 is: 638.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.48 : 1,418.58 = 425.46 : x
  2. Step 2: Convert to fraction form
    945.48/1,418.58 = 425.46/x
  3. Step 3: Cross multiply
    945.48x = 1,418.58 × 425.46
  4. Step 4: Simplify right side
    945.48x = 603,549.05
  5. Step 5: Solve for x
    x = 603,549.05/945.48
  6. Step 6: Final answer
    x = 638.35

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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.