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Finding the Fourth Proportional to 1,292.08, 1,937.08 and 561.15

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Solution

The fourth proportional to 1,292.08, 1,937.08 and 561.15 is: 841.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.08 : 1,937.08 = 561.15 : x
  2. Step 2: Convert to fraction form
    1,292.08/1,937.08 = 561.15/x
  3. Step 3: Cross multiply
    1,292.08x = 1,937.08 × 561.15
  4. Step 4: Simplify right side
    1,292.08x = 1,086,992.44
  5. Step 5: Solve for x
    x = 1,086,992.44/1,292.08
  6. Step 6: Final answer
    x = 841.27

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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.