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Finding the Fourth Proportional to 461.60, 692.52 and 390.32

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Solution

The fourth proportional to 461.60, 692.52 and 390.32 is: 585.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.60 : 692.52 = 390.32 : x
  2. Step 2: Convert to fraction form
    461.60/692.52 = 390.32/x
  3. Step 3: Cross multiply
    461.60x = 692.52 × 390.32
  4. Step 4: Simplify right side
    461.60x = 270,304.41
  5. Step 5: Solve for x
    x = 270,304.41/461.60
  6. Step 6: Final answer
    x = 585.58

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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.