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Finding the Fourth Proportional to 718,487.96, 991,405.17 and 412,577.69

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Solution

The fourth proportional to 718,487.96, 991,405.17 and 412,577.69 is: 569,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,487.96 : 991,405.17 = 412,577.69 : x
  2. Step 2: Convert to fraction form
    718,487.96/991,405.17 = 412,577.69/x
  3. Step 3: Cross multiply
    718,487.96x = 991,405.17 × 412,577.69
  4. Step 4: Simplify right side
    718,487.96x = 409,031,649,935.63
  5. Step 5: Solve for x
    x = 409,031,649,935.63/718,487.96
  6. Step 6: Final answer
    x = 569,295.07

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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.