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Finding the Fourth Proportional to 384.24, 577.47 and 319.65

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Solution

The fourth proportional to 384.24, 577.47 and 319.65 is: 480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.24 : 577.47 = 319.65 : x
  2. Step 2: Convert to fraction form
    384.24/577.47 = 319.65/x
  3. Step 3: Cross multiply
    384.24x = 577.47 × 319.65
  4. Step 4: Simplify right side
    384.24x = 184,588.29
  5. Step 5: Solve for x
    x = 184,588.29/384.24
  6. Step 6: Final answer
    x = 480.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.