Home / 1,289.32-1,933.98-315.41

Finding the Fourth Proportional to 1,289.32, 1,933.98 and 315.41

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Solution

The fourth proportional to 1,289.32, 1,933.98 and 315.41 is: 473.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.32 : 1,933.98 = 315.41 : x
  2. Step 2: Convert to fraction form
    1,289.32/1,933.98 = 315.41/x
  3. Step 3: Cross multiply
    1,289.32x = 1,933.98 × 315.41
  4. Step 4: Simplify right side
    1,289.32x = 609,996.63
  5. Step 5: Solve for x
    x = 609,996.63/1,289.32
  6. Step 6: Final answer
    x = 473.12

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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.