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Finding the Fourth Proportional to 638,803.80, 958,205.70 and 526,829.40

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Solution

The fourth proportional to 638,803.80, 958,205.70 and 526,829.40 is: 790,244.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,803.80 : 958,205.70 = 526,829.40 : x
  2. Step 2: Convert to fraction form
    638,803.80/958,205.70 = 526,829.40/x
  3. Step 3: Cross multiply
    638,803.80x = 958,205.70 × 526,829.40
  4. Step 4: Simplify right side
    638,803.80x = 504,810,934,007.58
  5. Step 5: Solve for x
    x = 504,810,934,007.58/638,803.80
  6. Step 6: Final answer
    x = 790,244.10

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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.