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Finding the Fourth Proportional to 374.02, 515.86 and 315.33

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Solution

The fourth proportional to 374.02, 515.86 and 315.33 is: 434.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.02 : 515.86 = 315.33 : x
  2. Step 2: Convert to fraction form
    374.02/515.86 = 315.33/x
  3. Step 3: Cross multiply
    374.02x = 515.86 × 315.33
  4. Step 4: Simplify right side
    374.02x = 162,666.13
  5. Step 5: Solve for x
    x = 162,666.13/374.02
  6. Step 6: Final answer
    x = 434.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.