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Finding the Fourth Proportional to 405.84, 559.08 and 340.32

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Solution

The fourth proportional to 405.84, 559.08 and 340.32 is: 468.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.84 : 559.08 = 340.32 : x
  2. Step 2: Convert to fraction form
    405.84/559.08 = 340.32/x
  3. Step 3: Cross multiply
    405.84x = 559.08 × 340.32
  4. Step 4: Simplify right side
    405.84x = 190,266.11
  5. Step 5: Solve for x
    x = 190,266.11/405.84
  6. Step 6: Final answer
    x = 468.82

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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.