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Finding the Fourth Proportional to 551,248.70, 760,676.55 and 309,512.30

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Solution

The fourth proportional to 551,248.70, 760,676.55 and 309,512.30 is: 427,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,248.70 : 760,676.55 = 309,512.30 : x
  2. Step 2: Convert to fraction form
    551,248.70/760,676.55 = 309,512.30/x
  3. Step 3: Cross multiply
    551,248.70x = 760,676.55 × 309,512.30
  4. Step 4: Simplify right side
    551,248.70x = 235,438,748,546.57
  5. Step 5: Solve for x
    x = 235,438,748,546.57/551,248.70
  6. Step 6: Final answer
    x = 427,100.78

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1.5x scale

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.