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Finding the Fourth Proportional to 1,207.52, 1,811.98 and 558.22

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Solution

The fourth proportional to 1,207.52, 1,811.98 and 558.22 is: 837.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.52 : 1,811.98 = 558.22 : x
  2. Step 2: Convert to fraction form
    1,207.52/1,811.98 = 558.22/x
  3. Step 3: Cross multiply
    1,207.52x = 1,811.98 × 558.22
  4. Step 4: Simplify right side
    1,207.52x = 1,011,483.48
  5. Step 5: Solve for x
    x = 1,011,483.48/1,207.52
  6. Step 6: Final answer
    x = 837.65

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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.