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Finding the Fourth Proportional to 662,509.92, 914,249.36 and 386,915.20

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Solution

The fourth proportional to 662,509.92, 914,249.36 and 386,915.20 is: 533,934.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,509.92 : 914,249.36 = 386,915.20 : x
  2. Step 2: Convert to fraction form
    662,509.92/914,249.36 = 386,915.20/x
  3. Step 3: Cross multiply
    662,509.92x = 914,249.36 × 386,915.20
  4. Step 4: Simplify right side
    662,509.92x = 353,736,973,974.27
  5. Step 5: Solve for x
    x = 353,736,973,974.27/662,509.92
  6. Step 6: Final answer
    x = 533,934.61

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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.