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Finding the Fourth Proportional to 1,023.99, 1,412.48 and 776.27

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Solution

The fourth proportional to 1,023.99, 1,412.48 and 776.27 is: 1,070.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.99 : 1,412.48 = 776.27 : x
  2. Step 2: Convert to fraction form
    1,023.99/1,412.48 = 776.27/x
  3. Step 3: Cross multiply
    1,023.99x = 1,412.48 × 776.27
  4. Step 4: Simplify right side
    1,023.99x = 1,096,454.91
  5. Step 5: Solve for x
    x = 1,096,454.91/1,023.99
  6. Step 6: Final answer
    x = 1,070.77

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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.