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Finding the Fourth Proportional to 709,774, 979,479.18 and 403,849.42

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Solution

The fourth proportional to 709,774, 979,479.18 and 403,849.42 is: 557,307.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,774 : 979,479.18 = 403,849.42 : x
  2. Step 2: Convert to fraction form
    709,774/979,479.18 = 403,849.42/x
  3. Step 3: Cross multiply
    709,774x = 979,479.18 × 403,849.42
  4. Step 4: Simplify right side
    709,774x = 395,562,098,745.08
  5. Step 5: Solve for x
    x = 395,562,098,745.08/709,774
  6. Step 6: Final answer
    x = 557,307.11

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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.