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Finding the Fourth Proportional to 559.12, 771.30 and 384.16

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Solution

The fourth proportional to 559.12, 771.30 and 384.16 is: 529.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.12 : 771.30 = 384.16 : x
  2. Step 2: Convert to fraction form
    559.12/771.30 = 384.16/x
  3. Step 3: Cross multiply
    559.12x = 771.30 × 384.16
  4. Step 4: Simplify right side
    559.12x = 296,302.61
  5. Step 5: Solve for x
    x = 296,302.61/559.12
  6. Step 6: Final answer
    x = 529.94

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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.