Home / 640,947.92-884,619.12-386,299.40

Finding the Fourth Proportional to 640,947.92, 884,619.12 and 386,299.40

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Solution

The fourth proportional to 640,947.92, 884,619.12 and 386,299.40 is: 533,160.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,947.92 : 884,619.12 = 386,299.40 : x
  2. Step 2: Convert to fraction form
    640,947.92/884,619.12 = 386,299.40/x
  3. Step 3: Cross multiply
    640,947.92x = 884,619.12 × 386,299.40
  4. Step 4: Simplify right side
    640,947.92x = 341,727,835,284.53
  5. Step 5: Solve for x
    x = 341,727,835,284.53/640,947.92
  6. Step 6: Final answer
    x = 533,160.07

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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.