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Finding the Fourth Proportional to 643,588.30, 888,151.85 and 357,154.48

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Solution

The fourth proportional to 643,588.30, 888,151.85 and 357,154.48 is: 492,873.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,588.30 : 888,151.85 = 357,154.48 : x
  2. Step 2: Convert to fraction form
    643,588.30/888,151.85 = 357,154.48/x
  3. Step 3: Cross multiply
    643,588.30x = 888,151.85 × 357,154.48
  4. Step 4: Simplify right side
    643,588.30x = 317,207,407,707.03
  5. Step 5: Solve for x
    x = 317,207,407,707.03/643,588.30
  6. Step 6: Final answer
    x = 492,873.18

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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.