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Finding the Fourth Proportional to 609,636.40, 912,899.40 and 485,220.40

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Solution

The fourth proportional to 609,636.40, 912,899.40 and 485,220.40 is: 726,592.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,636.40 : 912,899.40 = 485,220.40 : x
  2. Step 2: Convert to fraction form
    609,636.40/912,899.40 = 485,220.40/x
  3. Step 3: Cross multiply
    609,636.40x = 912,899.40 × 485,220.40
  4. Step 4: Simplify right side
    609,636.40x = 442,957,412,027.76
  5. Step 5: Solve for x
    x = 442,957,412,027.76/609,636.40
  6. Step 6: Final answer
    x = 726,592.79

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1.5x scale

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.