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Finding the Fourth Proportional to 609,031.28, 913,607.94 and 209,619.20

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Solution

The fourth proportional to 609,031.28, 913,607.94 and 209,619.20 is: 314,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,031.28 : 913,607.94 = 209,619.20 : x
  2. Step 2: Convert to fraction form
    609,031.28/913,607.94 = 209,619.20/x
  3. Step 3: Cross multiply
    609,031.28x = 913,607.94 × 209,619.20
  4. Step 4: Simplify right side
    609,031.28x = 191,509,765,496.45
  5. Step 5: Solve for x
    x = 191,509,765,496.45/609,031.28
  6. Step 6: Final answer
    x = 314,449.80

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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.