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Finding the Fourth Proportional to 1,125.00, 1,552.51 and 620.91

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Solution

The fourth proportional to 1,125.00, 1,552.51 and 620.91 is: 856.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.00 : 1,552.51 = 620.91 : x
  2. Step 2: Convert to fraction form
    1,125.00/1,552.51 = 620.91/x
  3. Step 3: Cross multiply
    1,125.00x = 1,552.51 × 620.91
  4. Step 4: Simplify right side
    1,125.00x = 963,961.22
  5. Step 5: Solve for x
    x = 963,961.22/1,125.00
  6. Step 6: Final answer
    x = 856.86

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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.