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Finding the Fourth Proportional to 559,336.78, 771,858.21 and 317,587.69

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Solution

The fourth proportional to 559,336.78, 771,858.21 and 317,587.69 is: 438,255.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,336.78 : 771,858.21 = 317,587.69 : x
  2. Step 2: Convert to fraction form
    559,336.78/771,858.21 = 317,587.69/x
  3. Step 3: Cross multiply
    559,336.78x = 771,858.21 × 317,587.69
  4. Step 4: Simplify right side
    559,336.78x = 245,132,665,921.44
  5. Step 5: Solve for x
    x = 245,132,665,921.44/559,336.78
  6. Step 6: Final answer
    x = 438,255.94

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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.