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Finding the Fourth Proportional to 609,716.40, 913,019.40 and 485,300.40

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Solution

The fourth proportional to 609,716.40, 913,019.40 and 485,300.40 is: 726,712.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,716.40 : 913,019.40 = 485,300.40 : x
  2. Step 2: Convert to fraction form
    609,716.40/913,019.40 = 485,300.40/x
  3. Step 3: Cross multiply
    609,716.40x = 913,019.40 × 485,300.40
  4. Step 4: Simplify right side
    609,716.40x = 443,088,680,027.76
  5. Step 5: Solve for x
    x = 443,088,680,027.76/609,716.40
  6. Step 6: Final answer
    x = 726,712.75

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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.