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Finding the Fourth Proportional to 911,309.68, 1,256,672.28 and 605,275.12

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Solution

The fourth proportional to 911,309.68, 1,256,672.28 and 605,275.12 is: 834,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,309.68 : 1,256,672.28 = 605,275.12 : x
  2. Step 2: Convert to fraction form
    911,309.68/1,256,672.28 = 605,275.12/x
  3. Step 3: Cross multiply
    911,309.68x = 1,256,672.28 × 605,275.12
  4. Step 4: Simplify right side
    911,309.68x = 760,632,465,077.67
  5. Step 5: Solve for x
    x = 760,632,465,077.67/911,309.68
  6. Step 6: Final answer
    x = 834,658.60

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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.