Home / 661,420.94-913,211.68-443,955.78

Finding the Fourth Proportional to 661,420.94, 913,211.68 and 443,955.78

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Solution

The fourth proportional to 661,420.94, 913,211.68 and 443,955.78 is: 612,961.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,420.94 : 913,211.68 = 443,955.78 : x
  2. Step 2: Convert to fraction form
    661,420.94/913,211.68 = 443,955.78/x
  3. Step 3: Cross multiply
    661,420.94x = 913,211.68 × 443,955.78
  4. Step 4: Simplify right side
    661,420.94x = 405,425,603,699.51
  5. Step 5: Solve for x
    x = 405,425,603,699.51/661,420.94
  6. Step 6: Final answer
    x = 612,961.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.