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Finding the Fourth Proportional to 403.02, 603.77 and 315.95

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Solution

The fourth proportional to 403.02, 603.77 and 315.95 is: 473.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.02 : 603.77 = 315.95 : x
  2. Step 2: Convert to fraction form
    403.02/603.77 = 315.95/x
  3. Step 3: Cross multiply
    403.02x = 603.77 × 315.95
  4. Step 4: Simplify right side
    403.02x = 190,756.53
  5. Step 5: Solve for x
    x = 190,756.53/403.02
  6. Step 6: Final answer
    x = 473.32

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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.