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Finding the Fourth Proportional to 805,613.90, 1,111,725 and 443,037.76

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Solution

The fourth proportional to 805,613.90, 1,111,725 and 443,037.76 is: 611,379.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,613.90 : 1,111,725 = 443,037.76 : x
  2. Step 2: Convert to fraction form
    805,613.90/1,111,725 = 443,037.76/x
  3. Step 3: Cross multiply
    805,613.90x = 1,111,725 × 443,037.76
  4. Step 4: Simplify right side
    805,613.90x = 492,536,153,736
  5. Step 5: Solve for x
    x = 492,536,153,736/805,613.90
  6. Step 6: Final answer
    x = 611,379.91

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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.