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Finding the Fourth Proportional to 469.99, 648.62 and 283.55

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Solution

The fourth proportional to 469.99, 648.62 and 283.55 is: 391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.99 : 648.62 = 283.55 : x
  2. Step 2: Convert to fraction form
    469.99/648.62 = 283.55/x
  3. Step 3: Cross multiply
    469.99x = 648.62 × 283.55
  4. Step 4: Simplify right side
    469.99x = 183,913.67
  5. Step 5: Solve for x
    x = 183,913.67/469.99
  6. Step 6: Final answer
    x = 391.32

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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.