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Finding the Fourth Proportional to 1,216.40, 1,824.74 and 631.67

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Solution

The fourth proportional to 1,216.40, 1,824.74 and 631.67 is: 947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.40 : 1,824.74 = 631.67 : x
  2. Step 2: Convert to fraction form
    1,216.40/1,824.74 = 631.67/x
  3. Step 3: Cross multiply
    1,216.40x = 1,824.74 × 631.67
  4. Step 4: Simplify right side
    1,216.40x = 1,152,639.66
  5. Step 5: Solve for x
    x = 1,152,639.66/1,216.40
  6. Step 6: Final answer
    x = 947.59

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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.