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Finding the Fourth Proportional to 643,975.86, 888,642.12 and 357,473.32

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Solution

The fourth proportional to 643,975.86, 888,642.12 and 357,473.32 is: 493,288.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,975.86 : 888,642.12 = 357,473.32 : x
  2. Step 2: Convert to fraction form
    643,975.86/888,642.12 = 357,473.32/x
  3. Step 3: Cross multiply
    643,975.86x = 888,642.12 × 357,473.32
  4. Step 4: Simplify right side
    643,975.86x = 317,665,848,928.24
  5. Step 5: Solve for x
    x = 317,665,848,928.24/643,975.86
  6. Step 6: Final answer
    x = 493,288.44

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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.