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Finding the Fourth Proportional to 893.32, 1,339.98 and 406.51

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Solution

The fourth proportional to 893.32, 1,339.98 and 406.51 is: 609.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.32 : 1,339.98 = 406.51 : x
  2. Step 2: Convert to fraction form
    893.32/1,339.98 = 406.51/x
  3. Step 3: Cross multiply
    893.32x = 1,339.98 × 406.51
  4. Step 4: Simplify right side
    893.32x = 544,710.40
  5. Step 5: Solve for x
    x = 544,710.40/893.32
  6. Step 6: Final answer
    x = 609.76

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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.