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Finding the Fourth Proportional to 309,688.55, 464,219.13 and 209,858.84

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Solution

The fourth proportional to 309,688.55, 464,219.13 and 209,858.84 is: 314,575.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,688.55 : 464,219.13 = 209,858.84 : x
  2. Step 2: Convert to fraction form
    309,688.55/464,219.13 = 209,858.84/x
  3. Step 3: Cross multiply
    309,688.55x = 464,219.13 × 209,858.84
  4. Step 4: Simplify right side
    309,688.55x = 97,420,488,127.61
  5. Step 5: Solve for x
    x = 97,420,488,127.61/309,688.55
  6. Step 6: Final answer
    x = 314,575.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.