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Finding the Fourth Proportional to 469.61, 648.04 and 259.77

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Solution

The fourth proportional to 469.61, 648.04 and 259.77 is: 358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.61 : 648.04 = 259.77 : x
  2. Step 2: Convert to fraction form
    469.61/648.04 = 259.77/x
  3. Step 3: Cross multiply
    469.61x = 648.04 × 259.77
  4. Step 4: Simplify right side
    469.61x = 168,341.35
  5. Step 5: Solve for x
    x = 168,341.35/469.61
  6. Step 6: Final answer
    x = 358.47

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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.