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Finding the Fourth Proportional to 370.98, 511.92 and 288.02

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Solution

The fourth proportional to 370.98, 511.92 and 288.02 is: 397.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.98 : 511.92 = 288.02 : x
  2. Step 2: Convert to fraction form
    370.98/511.92 = 288.02/x
  3. Step 3: Cross multiply
    370.98x = 511.92 × 288.02
  4. Step 4: Simplify right side
    370.98x = 147,444.48
  5. Step 5: Solve for x
    x = 147,444.48/370.98
  6. Step 6: Final answer
    x = 397.45

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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.