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Finding the Fourth Proportional to 283.41, 390.40 and 242.10

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Solution

The fourth proportional to 283.41, 390.40 and 242.10 is: 333.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.41 : 390.40 = 242.10 : x
  2. Step 2: Convert to fraction form
    283.41/390.40 = 242.10/x
  3. Step 3: Cross multiply
    283.41x = 390.40 × 242.10
  4. Step 4: Simplify right side
    283.41x = 94,515.84
  5. Step 5: Solve for x
    x = 94,515.84/283.41
  6. Step 6: Final answer
    x = 333.50

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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.