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Finding the Fourth Proportional to 505.03, 696.98 and 380.47

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Solution

The fourth proportional to 505.03, 696.98 and 380.47 is: 525.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.03 : 696.98 = 380.47 : x
  2. Step 2: Convert to fraction form
    505.03/696.98 = 380.47/x
  3. Step 3: Cross multiply
    505.03x = 696.98 × 380.47
  4. Step 4: Simplify right side
    505.03x = 265,179.98
  5. Step 5: Solve for x
    x = 265,179.98/505.03
  6. Step 6: Final answer
    x = 525.08

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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.