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Finding the Fourth Proportional to 605,189.30, 834,880.64 and 390,398.56

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Solution

The fourth proportional to 605,189.30, 834,880.64 and 390,398.56 is: 538,569.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,189.30 : 834,880.64 = 390,398.56 : x
  2. Step 2: Convert to fraction form
    605,189.30/834,880.64 = 390,398.56/x
  3. Step 3: Cross multiply
    605,189.30x = 834,880.64 × 390,398.56
  4. Step 4: Simplify right side
    605,189.30x = 325,936,195,588.68
  5. Step 5: Solve for x
    x = 325,936,195,588.68/605,189.30
  6. Step 6: Final answer
    x = 538,569.00

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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.