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Finding the Fourth Proportional to 945.93, 1,418.94 and 425.37

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Solution

The fourth proportional to 945.93, 1,418.94 and 425.37 is: 638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.93 : 1,418.94 = 425.37 : x
  2. Step 2: Convert to fraction form
    945.93/1,418.94 = 425.37/x
  3. Step 3: Cross multiply
    945.93x = 1,418.94 × 425.37
  4. Step 4: Simplify right side
    945.93x = 603,574.51
  5. Step 5: Solve for x
    x = 603,574.51/945.93
  6. Step 6: Final answer
    x = 638.08

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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.