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Finding the Fourth Proportional to 551,369.28, 760,854.84 and 309,645.66

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Solution

The fourth proportional to 551,369.28, 760,854.84 and 309,645.66 is: 427,291.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,369.28 : 760,854.84 = 309,645.66 : x
  2. Step 2: Convert to fraction form
    551,369.28/760,854.84 = 309,645.66/x
  3. Step 3: Cross multiply
    551,369.28x = 760,854.84 × 309,645.66
  4. Step 4: Simplify right side
    551,369.28x = 235,595,399,095.99
  5. Step 5: Solve for x
    x = 235,595,399,095.99/551,369.28
  6. Step 6: Final answer
    x = 427,291.49

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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.