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Finding the Fourth Proportional to 893.72, 1,339.74 and 503.93

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Solution

The fourth proportional to 893.72, 1,339.74 and 503.93 is: 755.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.72 : 1,339.74 = 503.93 : x
  2. Step 2: Convert to fraction form
    893.72/1,339.74 = 503.93/x
  3. Step 3: Cross multiply
    893.72x = 1,339.74 × 503.93
  4. Step 4: Simplify right side
    893.72x = 675,128.48
  5. Step 5: Solve for x
    x = 675,128.48/893.72
  6. Step 6: Final answer
    x = 755.42

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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.