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Finding the Fourth Proportional to 353,685.84, 530,134.56 and 128,862.24

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Solution

The fourth proportional to 353,685.84, 530,134.56 and 128,862.24 is: 193,149.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,685.84 : 530,134.56 = 128,862.24 : x
  2. Step 2: Convert to fraction form
    353,685.84/530,134.56 = 128,862.24/x
  3. Step 3: Cross multiply
    353,685.84x = 530,134.56 × 128,862.24
  4. Step 4: Simplify right side
    353,685.84x = 68,314,326,903.01
  5. Step 5: Solve for x
    x = 68,314,326,903.01/353,685.84
  6. Step 6: Final answer
    x = 193,149.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.