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Finding the Fourth Proportional to 383.69, 528.77 and 313.52

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Solution

The fourth proportional to 383.69, 528.77 and 313.52 is: 432.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.69 : 528.77 = 313.52 : x
  2. Step 2: Convert to fraction form
    383.69/528.77 = 313.52/x
  3. Step 3: Cross multiply
    383.69x = 528.77 × 313.52
  4. Step 4: Simplify right side
    383.69x = 165,779.51
  5. Step 5: Solve for x
    x = 165,779.51/383.69
  6. Step 6: Final answer
    x = 432.07

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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.