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Finding the Fourth Proportional to 469.21, 647.51 and 259.38

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Solution

The fourth proportional to 469.21, 647.51 and 259.38 is: 357.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.21 : 647.51 = 259.38 : x
  2. Step 2: Convert to fraction form
    469.21/647.51 = 259.38/x
  3. Step 3: Cross multiply
    469.21x = 647.51 × 259.38
  4. Step 4: Simplify right side
    469.21x = 167,953.13
  5. Step 5: Solve for x
    x = 167,953.13/469.21
  6. Step 6: Final answer
    x = 357.95

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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.