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Finding the Fourth Proportional to 569.63, 786.12 and 320.99

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Solution

The fourth proportional to 569.63, 786.12 and 320.99 is: 442.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.63 : 786.12 = 320.99 : x
  2. Step 2: Convert to fraction form
    569.63/786.12 = 320.99/x
  3. Step 3: Cross multiply
    569.63x = 786.12 × 320.99
  4. Step 4: Simplify right side
    569.63x = 252,336.22
  5. Step 5: Solve for x
    x = 252,336.22/569.63
  6. Step 6: Final answer
    x = 442.98

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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.