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Finding the Fourth Proportional to 1,006.16, 1,508.31 and 390.27

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Solution

The fourth proportional to 1,006.16, 1,508.31 and 390.27 is: 585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.16 : 1,508.31 = 390.27 : x
  2. Step 2: Convert to fraction form
    1,006.16/1,508.31 = 390.27/x
  3. Step 3: Cross multiply
    1,006.16x = 1,508.31 × 390.27
  4. Step 4: Simplify right side
    1,006.16x = 588,648.14
  5. Step 5: Solve for x
    x = 588,648.14/1,006.16
  6. Step 6: Final answer
    x = 585.05

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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.