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Finding the Fourth Proportional to 1,053.71, 1,580.30 and 505.75

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Solution

The fourth proportional to 1,053.71, 1,580.30 and 505.75 is: 758.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.71 : 1,580.30 = 505.75 : x
  2. Step 2: Convert to fraction form
    1,053.71/1,580.30 = 505.75/x
  3. Step 3: Cross multiply
    1,053.71x = 1,580.30 × 505.75
  4. Step 4: Simplify right side
    1,053.71x = 799,226.29
  5. Step 5: Solve for x
    x = 799,226.29/1,053.71
  6. Step 6: Final answer
    x = 758.49

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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.