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Finding the Fourth Proportional to 1,275.93, 1,913.90 and 351.59

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Solution

The fourth proportional to 1,275.93, 1,913.90 and 351.59 is: 527.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.93 : 1,913.90 = 351.59 : x
  2. Step 2: Convert to fraction form
    1,275.93/1,913.90 = 351.59/x
  3. Step 3: Cross multiply
    1,275.93x = 1,913.90 × 351.59
  4. Step 4: Simplify right side
    1,275.93x = 672,896.77
  5. Step 5: Solve for x
    x = 672,896.77/1,275.93
  6. Step 6: Final answer
    x = 527.38

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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.