Home / 1,314.77-1,972.14-390.96

Finding the Fourth Proportional to 1,314.77, 1,972.14 and 390.96

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Solution

The fourth proportional to 1,314.77, 1,972.14 and 390.96 is: 586.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.77 : 1,972.14 = 390.96 : x
  2. Step 2: Convert to fraction form
    1,314.77/1,972.14 = 390.96/x
  3. Step 3: Cross multiply
    1,314.77x = 1,972.14 × 390.96
  4. Step 4: Simplify right side
    1,314.77x = 771,017.99
  5. Step 5: Solve for x
    x = 771,017.99/1,314.77
  6. Step 6: Final answer
    x = 586.43

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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.