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Finding the Fourth Proportional to 551,630.70, 761,203.71 and 309,894.30

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Solution

The fourth proportional to 551,630.70, 761,203.71 and 309,894.30 is: 427,627.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,630.70 : 761,203.71 = 309,894.30 : x
  2. Step 2: Convert to fraction form
    551,630.70/761,203.71 = 309,894.30/x
  3. Step 3: Cross multiply
    551,630.70x = 761,203.71 × 309,894.30
  4. Step 4: Simplify right side
    551,630.70x = 235,892,690,867.85
  5. Step 5: Solve for x
    x = 235,892,690,867.85/551,630.70
  6. Step 6: Final answer
    x = 427,627.92

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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.