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Finding the Fourth Proportional to 578.70, 798.63 and 368.76

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Solution

The fourth proportional to 578.70, 798.63 and 368.76 is: 508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.70 : 798.63 = 368.76 : x
  2. Step 2: Convert to fraction form
    578.70/798.63 = 368.76/x
  3. Step 3: Cross multiply
    578.70x = 798.63 × 368.76
  4. Step 4: Simplify right side
    578.70x = 294,502.80
  5. Step 5: Solve for x
    x = 294,502.80/578.70
  6. Step 6: Final answer
    x = 508.90

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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.