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Finding the Fourth Proportional to 488.42, 730.62 and 400.77

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Solution

The fourth proportional to 488.42, 730.62 and 400.77 is: 599.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.42 : 730.62 = 400.77 : x
  2. Step 2: Convert to fraction form
    488.42/730.62 = 400.77/x
  3. Step 3: Cross multiply
    488.42x = 730.62 × 400.77
  4. Step 4: Simplify right side
    488.42x = 292,810.47
  5. Step 5: Solve for x
    x = 292,810.47/488.42
  6. Step 6: Final answer
    x = 599.50

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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.