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Finding the Fourth Proportional to 1,285.30, 1,773.71 and 754.51

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Solution

The fourth proportional to 1,285.30, 1,773.71 and 754.51 is: 1,041.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.30 : 1,773.71 = 754.51 : x
  2. Step 2: Convert to fraction form
    1,285.30/1,773.71 = 754.51/x
  3. Step 3: Cross multiply
    1,285.30x = 1,773.71 × 754.51
  4. Step 4: Simplify right side
    1,285.30x = 1,338,269.29
  5. Step 5: Solve for x
    x = 1,338,269.29/1,285.30
  6. Step 6: Final answer
    x = 1,041.21

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1.5x scale

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.