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Finding the Fourth Proportional to 438,659.88, 605,314.18 and 257,352.84

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Solution

The fourth proportional to 438,659.88, 605,314.18 and 257,352.84 is: 355,125.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,659.88 : 605,314.18 = 257,352.84 : x
  2. Step 2: Convert to fraction form
    438,659.88/605,314.18 = 257,352.84/x
  3. Step 3: Cross multiply
    438,659.88x = 605,314.18 × 257,352.84
  4. Step 4: Simplify right side
    438,659.88x = 155,779,323,315.27
  5. Step 5: Solve for x
    x = 155,779,323,315.27/438,659.88
  6. Step 6: Final answer
    x = 355,125.53

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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.