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Finding the Fourth Proportional to 626,438.76, 864,486.08 and 339,958.90

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Solution

The fourth proportional to 626,438.76, 864,486.08 and 339,958.90 is: 469,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,438.76 : 864,486.08 = 339,958.90 : x
  2. Step 2: Convert to fraction form
    626,438.76/864,486.08 = 339,958.90/x
  3. Step 3: Cross multiply
    626,438.76x = 864,486.08 × 339,958.90
  4. Step 4: Simplify right side
    626,438.76x = 293,889,736,822.11
  5. Step 5: Solve for x
    x = 293,889,736,822.11/626,438.76
  6. Step 6: Final answer
    x = 469,143.60

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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.