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Finding the Fourth Proportional to 609,363.79, 913,485.94 and 209,909.61

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Solution

The fourth proportional to 609,363.79, 913,485.94 and 209,909.61 is: 314,671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,363.79 : 913,485.94 = 209,909.61 : x
  2. Step 2: Convert to fraction form
    609,363.79/913,485.94 = 209,909.61/x
  3. Step 3: Cross multiply
    609,363.79x = 913,485.94 × 209,909.61
  4. Step 4: Simplify right side
    609,363.79x = 191,749,476,881.11
  5. Step 5: Solve for x
    x = 191,749,476,881.11/609,363.79
  6. Step 6: Final answer
    x = 314,671.60

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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.