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Finding the Fourth Proportional to 370.10, 510.91 and 287.01

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Solution

The fourth proportional to 370.10, 510.91 and 287.01 is: 396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.10 : 510.91 = 287.01 : x
  2. Step 2: Convert to fraction form
    370.10/510.91 = 287.01/x
  3. Step 3: Cross multiply
    370.10x = 510.91 × 287.01
  4. Step 4: Simplify right side
    370.10x = 146,636.28
  5. Step 5: Solve for x
    x = 146,636.28/370.10
  6. Step 6: Final answer
    x = 396.21

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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.