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Finding the Fourth Proportional to 302.09, 416.98 and 177.78

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Solution

The fourth proportional to 302.09, 416.98 and 177.78 is: 245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.09 : 416.98 = 177.78 : x
  2. Step 2: Convert to fraction form
    302.09/416.98 = 177.78/x
  3. Step 3: Cross multiply
    302.09x = 416.98 × 177.78
  4. Step 4: Simplify right side
    302.09x = 74,130.82
  5. Step 5: Solve for x
    x = 74,130.82/302.09
  6. Step 6: Final answer
    x = 245.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.