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Finding the Fourth Proportional to 561.02, 841.81 and 253.10

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Solution

The fourth proportional to 561.02, 841.81 and 253.10 is: 379.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.02 : 841.81 = 253.10 : x
  2. Step 2: Convert to fraction form
    561.02/841.81 = 253.10/x
  3. Step 3: Cross multiply
    561.02x = 841.81 × 253.10
  4. Step 4: Simplify right side
    561.02x = 213,062.11
  5. Step 5: Solve for x
    x = 213,062.11/561.02
  6. Step 6: Final answer
    x = 379.78

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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.