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Finding the Fourth Proportional to 479.68, 661.17 and 368.98

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Solution

The fourth proportional to 479.68, 661.17 and 368.98 is: 508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 661.17 = 368.98 : x
  2. Step 2: Convert to fraction form
    479.68/661.17 = 368.98/x
  3. Step 3: Cross multiply
    479.68x = 661.17 × 368.98
  4. Step 4: Simplify right side
    479.68x = 243,958.51
  5. Step 5: Solve for x
    x = 243,958.51/479.68
  6. Step 6: Final answer
    x = 508.59

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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.