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Finding the Fourth Proportional to 545.58, 821.88 and 505.44

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Solution

The fourth proportional to 545.58, 821.88 and 505.44 is: 761.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.58 : 821.88 = 505.44 : x
  2. Step 2: Convert to fraction form
    545.58/821.88 = 505.44/x
  3. Step 3: Cross multiply
    545.58x = 821.88 × 505.44
  4. Step 4: Simplify right side
    545.58x = 415,411.03
  5. Step 5: Solve for x
    x = 415,411.03/545.58
  6. Step 6: Final answer
    x = 761.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.