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Finding the Fourth Proportional to 861,527.70, 1,189,019.70 and 494,148.15

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Solution

The fourth proportional to 861,527.70, 1,189,019.70 and 494,148.15 is: 681,988.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,527.70 : 1,189,019.70 = 494,148.15 : x
  2. Step 2: Convert to fraction form
    861,527.70/1,189,019.70 = 494,148.15/x
  3. Step 3: Cross multiply
    861,527.70x = 1,189,019.70 × 494,148.15
  4. Step 4: Simplify right side
    861,527.70x = 587,551,882,597.81
  5. Step 5: Solve for x
    x = 587,551,882,597.81/861,527.70
  6. Step 6: Final answer
    x = 681,988.38

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Double scale
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1.5x scale

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.