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Finding the Fourth Proportional to 559.90, 835.61 and 545.32

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Solution

The fourth proportional to 559.90, 835.61 and 545.32 is: 813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.90 : 835.61 = 545.32 : x
  2. Step 2: Convert to fraction form
    559.90/835.61 = 545.32/x
  3. Step 3: Cross multiply
    559.90x = 835.61 × 545.32
  4. Step 4: Simplify right side
    559.90x = 455,676.71
  5. Step 5: Solve for x
    x = 455,676.71/559.90
  6. Step 6: Final answer
    x = 813.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.