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Finding the Fourth Proportional to 616,919.78, 851,351.57 and 358,858.64

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Solution

The fourth proportional to 616,919.78, 851,351.57 and 358,858.64 is: 495,226.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,919.78 : 851,351.57 = 358,858.64 : x
  2. Step 2: Convert to fraction form
    616,919.78/851,351.57 = 358,858.64/x
  3. Step 3: Cross multiply
    616,919.78x = 851,351.57 × 358,858.64
  4. Step 4: Simplify right side
    616,919.78x = 305,514,860,521.01
  5. Step 5: Solve for x
    x = 305,514,860,521.01/616,919.78
  6. Step 6: Final answer
    x = 495,226.24

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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.