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Finding the Fourth Proportional to 370.16, 510.51 and 287.12

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Solution

The fourth proportional to 370.16, 510.51 and 287.12 is: 395.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.16 : 510.51 = 287.12 : x
  2. Step 2: Convert to fraction form
    370.16/510.51 = 287.12/x
  3. Step 3: Cross multiply
    370.16x = 510.51 × 287.12
  4. Step 4: Simplify right side
    370.16x = 146,577.63
  5. Step 5: Solve for x
    x = 146,577.63/370.16
  6. Step 6: Final answer
    x = 395.98

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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.