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Finding the Fourth Proportional to 370.71, 513 and 315.36

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Solution

The fourth proportional to 370.71, 513 and 315.36 is: 436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.71 : 513 = 315.36 : x
  2. Step 2: Convert to fraction form
    370.71/513 = 315.36/x
  3. Step 3: Cross multiply
    370.71x = 513 × 315.36
  4. Step 4: Simplify right side
    370.71x = 161,779.68
  5. Step 5: Solve for x
    x = 161,779.68/370.71
  6. Step 6: Final answer
    x = 436.40

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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.