Home / 865,408.40-1,298,129.31-266,368.94

Finding the Fourth Proportional to 865,408.40, 1,298,129.31 and 266,368.94

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Solution

The fourth proportional to 865,408.40, 1,298,129.31 and 266,368.94 is: 399,558.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,408.40 : 1,298,129.31 = 266,368.94 : x
  2. Step 2: Convert to fraction form
    865,408.40/1,298,129.31 = 266,368.94/x
  3. Step 3: Cross multiply
    865,408.40x = 1,298,129.31 × 266,368.94
  4. Step 4: Simplify right side
    865,408.40x = 345,781,331,532.96
  5. Step 5: Solve for x
    x = 345,781,331,532.96/865,408.40
  6. Step 6: Final answer
    x = 399,558.56

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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.