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Finding the Fourth Proportional to 661,099.38, 912,238.38 and 389,106.96

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Solution

The fourth proportional to 661,099.38, 912,238.38 and 389,106.96 is: 536,921.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,099.38 : 912,238.38 = 389,106.96 : x
  2. Step 2: Convert to fraction form
    661,099.38/912,238.38 = 389,106.96/x
  3. Step 3: Cross multiply
    661,099.38x = 912,238.38 × 389,106.96
  4. Step 4: Simplify right side
    661,099.38x = 354,958,302,837.13
  5. Step 5: Solve for x
    x = 354,958,302,837.13/661,099.38
  6. Step 6: Final answer
    x = 536,921.25

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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.