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Finding the Fourth Proportional to 370, 510.40 and 230.20

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Solution

The fourth proportional to 370, 510.40 and 230.20 is: 317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    370 : 510.40 = 230.20 : x
  2. Step 2: Convert to fraction form
    370/510.40 = 230.20/x
  3. Step 3: Cross multiply
    370x = 510.40 × 230.20
  4. Step 4: Simplify right side
    370x = 117,494.08
  5. Step 5: Solve for x
    x = 117,494.08/370
  6. Step 6: Final answer
    x = 317.55

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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.