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Finding the Fourth Proportional to 612,876.43, 918,518.19 and 342,993.34

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Solution

The fourth proportional to 612,876.43, 918,518.19 and 342,993.34 is: 514,044.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,876.43 : 918,518.19 = 342,993.34 : x
  2. Step 2: Convert to fraction form
    612,876.43/918,518.19 = 342,993.34/x
  3. Step 3: Cross multiply
    612,876.43x = 918,518.19 × 342,993.34
  4. Step 4: Simplify right side
    612,876.43x = 315,045,617,246.26
  5. Step 5: Solve for x
    x = 315,045,617,246.26/612,876.43
  6. Step 6: Final answer
    x = 514,044.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.