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Finding the Fourth Proportional to 390.93, 536.66 and 335.57

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Solution

The fourth proportional to 390.93, 536.66 and 335.57 is: 460.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.93 : 536.66 = 335.57 : x
  2. Step 2: Convert to fraction form
    390.93/536.66 = 335.57/x
  3. Step 3: Cross multiply
    390.93x = 536.66 × 335.57
  4. Step 4: Simplify right side
    390.93x = 180,085.32
  5. Step 5: Solve for x
    x = 180,085.32/390.93
  6. Step 6: Final answer
    x = 460.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.