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Finding the Fourth Proportional to 340.40, 510.60 and 201.80

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Solution

The fourth proportional to 340.40, 510.60 and 201.80 is: 302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.40 : 510.60 = 201.80 : x
  2. Step 2: Convert to fraction form
    340.40/510.60 = 201.80/x
  3. Step 3: Cross multiply
    340.40x = 510.60 × 201.80
  4. Step 4: Simplify right side
    340.40x = 103,039.08
  5. Step 5: Solve for x
    x = 103,039.08/340.40
  6. Step 6: Final answer
    x = 302.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.