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Finding the Fourth Proportional to 469.90, 647.93 and 301.62

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Solution

The fourth proportional to 469.90, 647.93 and 301.62 is: 415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.90 : 647.93 = 301.62 : x
  2. Step 2: Convert to fraction form
    469.90/647.93 = 301.62/x
  3. Step 3: Cross multiply
    469.90x = 647.93 × 301.62
  4. Step 4: Simplify right side
    469.90x = 195,431.83
  5. Step 5: Solve for x
    x = 195,431.83/469.90
  6. Step 6: Final answer
    x = 415.90

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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.