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Finding the Fourth Proportional to 709,443.06, 979,063.35 and 399,452.42

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Solution

The fourth proportional to 709,443.06, 979,063.35 and 399,452.42 is: 551,262.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,443.06 : 979,063.35 = 399,452.42 : x
  2. Step 2: Convert to fraction form
    709,443.06/979,063.35 = 399,452.42/x
  3. Step 3: Cross multiply
    709,443.06x = 979,063.35 × 399,452.42
  4. Step 4: Simplify right side
    709,443.06x = 391,089,219,595.49
  5. Step 5: Solve for x
    x = 391,089,219,595.49/709,443.06
  6. Step 6: Final answer
    x = 551,262.31

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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.