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Finding the Fourth Proportional to 290.07, 400.40 and 203.00

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Solution

The fourth proportional to 290.07, 400.40 and 203.00 is: 280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.07 : 400.40 = 203.00 : x
  2. Step 2: Convert to fraction form
    290.07/400.40 = 203.00/x
  3. Step 3: Cross multiply
    290.07x = 400.40 × 203.00
  4. Step 4: Simplify right side
    290.07x = 81,278.18
  5. Step 5: Solve for x
    x = 81,278.18/290.07
  6. Step 6: Final answer
    x = 280.20

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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.