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Finding the Fourth Proportional to 1,291.25, 1,937.16 and 469.50

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Solution

The fourth proportional to 1,291.25, 1,937.16 and 469.50 is: 704.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.25 : 1,937.16 = 469.50 : x
  2. Step 2: Convert to fraction form
    1,291.25/1,937.16 = 469.50/x
  3. Step 3: Cross multiply
    1,291.25x = 1,937.16 × 469.50
  4. Step 4: Simplify right side
    1,291.25x = 909,496.62
  5. Step 5: Solve for x
    x = 909,496.62/1,291.25
  6. Step 6: Final answer
    x = 704.36

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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.