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Finding the Fourth Proportional to 937.90, 1,405.77 and 571.87

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Solution

The fourth proportional to 937.90, 1,405.77 and 571.87 is: 857.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.90 : 1,405.77 = 571.87 : x
  2. Step 2: Convert to fraction form
    937.90/1,405.77 = 571.87/x
  3. Step 3: Cross multiply
    937.90x = 1,405.77 × 571.87
  4. Step 4: Simplify right side
    937.90x = 803,917.69
  5. Step 5: Solve for x
    x = 803,917.69/937.90
  6. Step 6: Final answer
    x = 857.15

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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.