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Finding the Fourth Proportional to 561.86, 841.86 and 253.25

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Solution

The fourth proportional to 561.86, 841.86 and 253.25 is: 379.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.86 : 841.86 = 253.25 : x
  2. Step 2: Convert to fraction form
    561.86/841.86 = 253.25/x
  3. Step 3: Cross multiply
    561.86x = 841.86 × 253.25
  4. Step 4: Simplify right side
    561.86x = 213,196.84
  5. Step 5: Solve for x
    x = 213,196.84/561.86
  6. Step 6: Final answer
    x = 379.45

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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.