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Finding the Fourth Proportional to 505.55, 697.69 and 284.52

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Solution

The fourth proportional to 505.55, 697.69 and 284.52 is: 392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.55 : 697.69 = 284.52 : x
  2. Step 2: Convert to fraction form
    505.55/697.69 = 284.52/x
  3. Step 3: Cross multiply
    505.55x = 697.69 × 284.52
  4. Step 4: Simplify right side
    505.55x = 198,506.76
  5. Step 5: Solve for x
    x = 198,506.76/505.55
  6. Step 6: Final answer
    x = 392.66

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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.