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Finding the Fourth Proportional to 1,216.04, 1,824.30 and 782.60

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Solution

The fourth proportional to 1,216.04, 1,824.30 and 782.60 is: 1,174.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.04 : 1,824.30 = 782.60 : x
  2. Step 2: Convert to fraction form
    1,216.04/1,824.30 = 782.60/x
  3. Step 3: Cross multiply
    1,216.04x = 1,824.30 × 782.60
  4. Step 4: Simplify right side
    1,216.04x = 1,427,697.18
  5. Step 5: Solve for x
    x = 1,427,697.18/1,216.04
  6. Step 6: Final answer
    x = 1,174.05

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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.