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Finding the Fourth Proportional to 1,149.08, 1,585.78 and 651.68

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Solution

The fourth proportional to 1,149.08, 1,585.78 and 651.68 is: 899.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.08 : 1,585.78 = 651.68 : x
  2. Step 2: Convert to fraction form
    1,149.08/1,585.78 = 651.68/x
  3. Step 3: Cross multiply
    1,149.08x = 1,585.78 × 651.68
  4. Step 4: Simplify right side
    1,149.08x = 1,033,421.11
  5. Step 5: Solve for x
    x = 1,033,421.11/1,149.08
  6. Step 6: Final answer
    x = 899.35

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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.