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Finding the Fourth Proportional to 438,559.79, 605,222.45 and 257,402.37

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Solution

The fourth proportional to 438,559.79, 605,222.45 and 257,402.37 is: 355,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,559.79 : 605,222.45 = 257,402.37 : x
  2. Step 2: Convert to fraction form
    438,559.79/605,222.45 = 257,402.37/x
  3. Step 3: Cross multiply
    438,559.79x = 605,222.45 × 257,402.37
  4. Step 4: Simplify right side
    438,559.79x = 155,785,693,007.21
  5. Step 5: Solve for x
    x = 155,785,693,007.21/438,559.79
  6. Step 6: Final answer
    x = 355,221.10

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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.