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Finding the Fourth Proportional to 709,879.52, 979,620.60 and 403,949.12

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Solution

The fourth proportional to 709,879.52, 979,620.60 and 403,949.12 is: 557,442.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,879.52 : 979,620.60 = 403,949.12 : x
  2. Step 2: Convert to fraction form
    709,879.52/979,620.60 = 403,949.12/x
  3. Step 3: Cross multiply
    709,879.52x = 979,620.60 × 403,949.12
  4. Step 4: Simplify right side
    709,879.52x = 395,716,879,303.87
  5. Step 5: Solve for x
    x = 395,716,879,303.87/709,879.52
  6. Step 6: Final answer
    x = 557,442.31

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1.5x scale

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.