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Finding the Fourth Proportional to 512,393.65, 768,618.45 and 212,904.52

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Solution

The fourth proportional to 512,393.65, 768,618.45 and 212,904.52 is: 319,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,393.65 : 768,618.45 = 212,904.52 : x
  2. Step 2: Convert to fraction form
    512,393.65/768,618.45 = 212,904.52/x
  3. Step 3: Cross multiply
    512,393.65x = 768,618.45 × 212,904.52
  4. Step 4: Simplify right side
    512,393.65x = 163,642,342,160.39
  5. Step 5: Solve for x
    x = 163,642,342,160.39/512,393.65
  6. Step 6: Final answer
    x = 319,368.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.