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Finding the Fourth Proportional to 643,581.03, 888,145.12 and 357,101.04

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Solution

The fourth proportional to 643,581.03, 888,145.12 and 357,101.04 is: 492,801.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,581.03 : 888,145.12 = 357,101.04 : x
  2. Step 2: Convert to fraction form
    643,581.03/888,145.12 = 357,101.04/x
  3. Step 3: Cross multiply
    643,581.03x = 888,145.12 × 357,101.04
  4. Step 4: Simplify right side
    643,581.03x = 317,157,546,022.93
  5. Step 5: Solve for x
    x = 317,157,546,022.93/643,581.03
  6. Step 6: Final answer
    x = 492,801.27

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Double scale
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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.