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Finding the Fourth Proportional to 1,020.77, 1,527.91 and 813.01

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Solution

The fourth proportional to 1,020.77, 1,527.91 and 813.01 is: 1,216.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.77 : 1,527.91 = 813.01 : x
  2. Step 2: Convert to fraction form
    1,020.77/1,527.91 = 813.01/x
  3. Step 3: Cross multiply
    1,020.77x = 1,527.91 × 813.01
  4. Step 4: Simplify right side
    1,020.77x = 1,242,200.26
  5. Step 5: Solve for x
    x = 1,242,200.26/1,020.77
  6. Step 6: Final answer
    x = 1,216.92

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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.