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Finding the Fourth Proportional to 504.79, 696.71 and 283.70

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Solution

The fourth proportional to 504.79, 696.71 and 283.70 is: 391.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.79 : 696.71 = 283.70 : x
  2. Step 2: Convert to fraction form
    504.79/696.71 = 283.70/x
  3. Step 3: Cross multiply
    504.79x = 696.71 × 283.70
  4. Step 4: Simplify right side
    504.79x = 197,659.08
  5. Step 5: Solve for x
    x = 197,659.08/504.79
  6. Step 6: Final answer
    x = 391.57

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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.