Home / 805,128.46-1,207,890.43-400,511.59

Finding the Fourth Proportional to 805,128.46, 1,207,890.43 and 400,511.59

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Solution

The fourth proportional to 805,128.46, 1,207,890.43 and 400,511.59 is: 600,865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,128.46 : 1,207,890.43 = 400,511.59 : x
  2. Step 2: Convert to fraction form
    805,128.46/1,207,890.43 = 400,511.59/x
  3. Step 3: Cross multiply
    805,128.46x = 1,207,890.43 × 400,511.59
  4. Step 4: Simplify right side
    805,128.46x = 483,774,112,644.08
  5. Step 5: Solve for x
    x = 483,774,112,644.08/805,128.46
  6. Step 6: Final answer
    x = 600,865.75

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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.