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Finding the Fourth Proportional to 584.63, 807.45 and 397.80

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Solution

The fourth proportional to 584.63, 807.45 and 397.80 is: 549.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.63 : 807.45 = 397.80 : x
  2. Step 2: Convert to fraction form
    584.63/807.45 = 397.80/x
  3. Step 3: Cross multiply
    584.63x = 807.45 × 397.80
  4. Step 4: Simplify right side
    584.63x = 321,203.61
  5. Step 5: Solve for x
    x = 321,203.61/584.63
  6. Step 6: Final answer
    x = 549.42

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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.