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Finding the Fourth Proportional to 478.90, 659.62 and 368.16

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Solution

The fourth proportional to 478.90, 659.62 and 368.16 is: 507.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.90 : 659.62 = 368.16 : x
  2. Step 2: Convert to fraction form
    478.90/659.62 = 368.16/x
  3. Step 3: Cross multiply
    478.90x = 659.62 × 368.16
  4. Step 4: Simplify right side
    478.90x = 242,845.70
  5. Step 5: Solve for x
    x = 242,845.70/478.90
  6. Step 6: Final answer
    x = 507.09

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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.