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Finding the Fourth Proportional to 709,930.08, 979,702.38 and 455,280.84

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Solution

The fourth proportional to 709,930.08, 979,702.38 and 455,280.84 is: 628,286.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,930.08 : 979,702.38 = 455,280.84 : x
  2. Step 2: Convert to fraction form
    709,930.08/979,702.38 = 455,280.84/x
  3. Step 3: Cross multiply
    709,930.08x = 979,702.38 × 455,280.84
  4. Step 4: Simplify right side
    709,930.08x = 446,039,722,516.40
  5. Step 5: Solve for x
    x = 446,039,722,516.40/709,930.08
  6. Step 6: Final answer
    x = 628,286.83

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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.