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Finding the Fourth Proportional to 692,639.87, 955,833.72 and 386,720.95

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Solution

The fourth proportional to 692,639.87, 955,833.72 and 386,720.95 is: 533,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,639.87 : 955,833.72 = 386,720.95 : x
  2. Step 2: Convert to fraction form
    692,639.87/955,833.72 = 386,720.95/x
  3. Step 3: Cross multiply
    692,639.87x = 955,833.72 × 386,720.95
  4. Step 4: Simplify right side
    692,639.87x = 369,640,919,461.27
  5. Step 5: Solve for x
    x = 369,640,919,461.27/692,639.87
  6. Step 6: Final answer
    x = 533,669.71

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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.