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Finding the Fourth Proportional to 438,720.58, 605,378.77 and 257,366.34

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Solution

The fourth proportional to 438,720.58, 605,378.77 and 257,366.34 is: 355,132.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,720.58 : 605,378.77 = 257,366.34 : x
  2. Step 2: Convert to fraction form
    438,720.58/605,378.77 = 257,366.34/x
  3. Step 3: Cross multiply
    438,720.58x = 605,378.77 × 257,366.34
  4. Step 4: Simplify right side
    438,720.58x = 155,804,118,348.60
  5. Step 5: Solve for x
    x = 155,804,118,348.60/438,720.58
  6. Step 6: Final answer
    x = 355,132.91

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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.