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Finding the Fourth Proportional to 551,229.36, 760,686.84 and 309,513.84

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Solution

The fourth proportional to 551,229.36, 760,686.84 and 309,513.84 is: 427,123.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,229.36 : 760,686.84 = 309,513.84 : x
  2. Step 2: Convert to fraction form
    551,229.36/760,686.84 = 309,513.84/x
  3. Step 3: Cross multiply
    551,229.36x = 760,686.84 × 309,513.84
  4. Step 4: Simplify right side
    551,229.36x = 235,443,104,885.87
  5. Step 5: Solve for x
    x = 235,443,104,885.87/551,229.36
  6. Step 6: Final answer
    x = 427,123.67

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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.