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Finding the Fourth Proportional to 826.36, 1,140.15 and 511.47

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Solution

The fourth proportional to 826.36, 1,140.15 and 511.47 is: 705.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.36 : 1,140.15 = 511.47 : x
  2. Step 2: Convert to fraction form
    826.36/1,140.15 = 511.47/x
  3. Step 3: Cross multiply
    826.36x = 1,140.15 × 511.47
  4. Step 4: Simplify right side
    826.36x = 583,155.37
  5. Step 5: Solve for x
    x = 583,155.37/826.36
  6. Step 6: Final answer
    x = 705.69

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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.