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Finding the Fourth Proportional to 643,754.16, 888,369.66 and 357,286.32

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Solution

The fourth proportional to 643,754.16, 888,369.66 and 357,286.32 is: 493,048.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,754.16 : 888,369.66 = 357,286.32 : x
  2. Step 2: Convert to fraction form
    643,754.16/888,369.66 = 357,286.32/x
  3. Step 3: Cross multiply
    643,754.16x = 888,369.66 × 357,286.32
  4. Step 4: Simplify right side
    643,754.16x = 317,402,326,621.05
  5. Step 5: Solve for x
    x = 317,402,326,621.05/643,754.16
  6. Step 6: Final answer
    x = 493,048.97

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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.