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Finding the Fourth Proportional to 2,315.18, 3,472.58 and 909.63

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Solution

The fourth proportional to 2,315.18, 3,472.58 and 909.63 is: 1,364.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.18 : 3,472.58 = 909.63 : x
  2. Step 2: Convert to fraction form
    2,315.18/3,472.58 = 909.63/x
  3. Step 3: Cross multiply
    2,315.18x = 3,472.58 × 909.63
  4. Step 4: Simplify right side
    2,315.18x = 3,158,765.22
  5. Step 5: Solve for x
    x = 3,158,765.22/2,315.18
  6. Step 6: Final answer
    x = 1,364.37

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1.5x scale

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.