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Finding the Fourth Proportional to 694,489.62, 958,432.80 and 388,547.76

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Solution

The fourth proportional to 694,489.62, 958,432.80 and 388,547.76 is: 536,216.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,489.62 : 958,432.80 = 388,547.76 : x
  2. Step 2: Convert to fraction form
    694,489.62/958,432.80 = 388,547.76/x
  3. Step 3: Cross multiply
    694,489.62x = 958,432.80 × 388,547.76
  4. Step 4: Simplify right side
    694,489.62x = 372,396,917,550.53
  5. Step 5: Solve for x
    x = 372,396,917,550.53/694,489.62
  6. Step 6: Final answer
    x = 536,216.68

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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.