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Finding the Fourth Proportional to 601.74, 830.12 and 405.32

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Solution

The fourth proportional to 601.74, 830.12 and 405.32 is: 559.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.74 : 830.12 = 405.32 : x
  2. Step 2: Convert to fraction form
    601.74/830.12 = 405.32/x
  3. Step 3: Cross multiply
    601.74x = 830.12 × 405.32
  4. Step 4: Simplify right side
    601.74x = 336,458.06
  5. Step 5: Solve for x
    x = 336,458.06/601.74
  6. Step 6: Final answer
    x = 559.14

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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.