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Finding the Fourth Proportional to 626,430.09, 864,479.87 and 339,952.65

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Solution

The fourth proportional to 626,430.09, 864,479.87 and 339,952.65 is: 469,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,430.09 : 864,479.87 = 339,952.65 : x
  2. Step 2: Convert to fraction form
    626,430.09/864,479.87 = 339,952.65/x
  3. Step 3: Cross multiply
    626,430.09x = 864,479.87 × 339,952.65
  4. Step 4: Simplify right side
    626,430.09x = 293,882,220,978.39
  5. Step 5: Solve for x
    x = 293,882,220,978.39/626,430.09
  6. Step 6: Final answer
    x = 469,138.10

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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.