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Finding the Fourth Proportional to 709,705.67, 979,381.17 and 403,775.46

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Solution

The fourth proportional to 709,705.67, 979,381.17 and 403,775.46 is: 557,202.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,705.67 : 979,381.17 = 403,775.46 : x
  2. Step 2: Convert to fraction form
    709,705.67/979,381.17 = 403,775.46/x
  3. Step 3: Cross multiply
    709,705.67x = 979,381.17 × 403,775.46
  4. Step 4: Simplify right side
    709,705.67x = 395,450,082,432.09
  5. Step 5: Solve for x
    x = 395,450,082,432.09/709,705.67
  6. Step 6: Final answer
    x = 557,202.94

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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.