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Finding the Fourth Proportional to 550.64, 821.80 and 510.50

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Solution

The fourth proportional to 550.64, 821.80 and 510.50 is: 761.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.64 : 821.80 = 510.50 : x
  2. Step 2: Convert to fraction form
    550.64/821.80 = 510.50/x
  3. Step 3: Cross multiply
    550.64x = 821.80 × 510.50
  4. Step 4: Simplify right side
    550.64x = 419,528.90
  5. Step 5: Solve for x
    x = 419,528.90/550.64
  6. Step 6: Final answer
    x = 761.89

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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.