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Finding the Fourth Proportional to 661,570.25, 912,912.05 and 371,142.09

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Solution

The fourth proportional to 661,570.25, 912,912.05 and 371,142.09 is: 512,145.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,570.25 : 912,912.05 = 371,142.09 : x
  2. Step 2: Convert to fraction form
    661,570.25/912,912.05 = 371,142.09/x
  3. Step 3: Cross multiply
    661,570.25x = 912,912.05 × 371,142.09
  4. Step 4: Simplify right side
    661,570.25x = 338,820,087,151.04
  5. Step 5: Solve for x
    x = 338,820,087,151.04/661,570.25
  6. Step 6: Final answer
    x = 512,145.29

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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.