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Finding the Fourth Proportional to 750.87, 1,037.48 and 620.19

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Solution

The fourth proportional to 750.87, 1,037.48 and 620.19 is: 856.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.87 : 1,037.48 = 620.19 : x
  2. Step 2: Convert to fraction form
    750.87/1,037.48 = 620.19/x
  3. Step 3: Cross multiply
    750.87x = 1,037.48 × 620.19
  4. Step 4: Simplify right side
    750.87x = 643,431.62
  5. Step 5: Solve for x
    x = 643,431.62/750.87
  6. Step 6: Final answer
    x = 856.91

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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.