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Finding the Fourth Proportional to 805,689.61, 1,208,534.72 and 206,650.72

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Solution

The fourth proportional to 805,689.61, 1,208,534.72 and 206,650.72 is: 309,976.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,689.61 : 1,208,534.72 = 206,650.72 : x
  2. Step 2: Convert to fraction form
    805,689.61/1,208,534.72 = 206,650.72/x
  3. Step 3: Cross multiply
    805,689.61x = 1,208,534.72 × 206,650.72
  4. Step 4: Simplify right side
    805,689.61x = 249,744,570,033.00
  5. Step 5: Solve for x
    x = 249,744,570,033.00/805,689.61
  6. Step 6: Final answer
    x = 309,976.16

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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.