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Finding the Fourth Proportional to 643,529.64, 888,071.04 and 357,049.05

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Solution

The fourth proportional to 643,529.64, 888,071.04 and 357,049.05 is: 492,727.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,529.64 : 888,071.04 = 357,049.05 : x
  2. Step 2: Convert to fraction form
    643,529.64/888,071.04 = 357,049.05/x
  3. Step 3: Cross multiply
    643,529.64x = 888,071.04 × 357,049.05
  4. Step 4: Simplify right side
    643,529.64x = 317,084,921,164.51
  5. Step 5: Solve for x
    x = 317,084,921,164.51/643,529.64
  6. Step 6: Final answer
    x = 492,727.76

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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.