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Finding the Fourth Proportional to 1,005.62, 1,507.26 and 890.29

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Solution

The fourth proportional to 1,005.62, 1,507.26 and 890.29 is: 1,334.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.62 : 1,507.26 = 890.29 : x
  2. Step 2: Convert to fraction form
    1,005.62/1,507.26 = 890.29/x
  3. Step 3: Cross multiply
    1,005.62x = 1,507.26 × 890.29
  4. Step 4: Simplify right side
    1,005.62x = 1,341,898.72
  5. Step 5: Solve for x
    x = 1,341,898.72/1,005.62
  6. Step 6: Final answer
    x = 1,334.41

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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.