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Finding the Fourth Proportional to 502,388.84, 693,256.38 and 287,479.64

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Solution

The fourth proportional to 502,388.84, 693,256.38 and 287,479.64 is: 396,698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,388.84 : 693,256.38 = 287,479.64 : x
  2. Step 2: Convert to fraction form
    502,388.84/693,256.38 = 287,479.64/x
  3. Step 3: Cross multiply
    502,388.84x = 693,256.38 × 287,479.64
  4. Step 4: Simplify right side
    502,388.84x = 199,297,094,550.10
  5. Step 5: Solve for x
    x = 199,297,094,550.10/502,388.84
  6. Step 6: Final answer
    x = 396,698.89

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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.