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Finding the Fourth Proportional to 505.07, 696.48 and 347.84

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Solution

The fourth proportional to 505.07, 696.48 and 347.84 is: 479.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.07 : 696.48 = 347.84 : x
  2. Step 2: Convert to fraction form
    505.07/696.48 = 347.84/x
  3. Step 3: Cross multiply
    505.07x = 696.48 × 347.84
  4. Step 4: Simplify right side
    505.07x = 242,263.60
  5. Step 5: Solve for x
    x = 242,263.60/505.07
  6. Step 6: Final answer
    x = 479.66

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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.