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Finding the Fourth Proportional to 1,059.02, 1,461.24 and 666.60

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Solution

The fourth proportional to 1,059.02, 1,461.24 and 666.60 is: 919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.02 : 1,461.24 = 666.60 : x
  2. Step 2: Convert to fraction form
    1,059.02/1,461.24 = 666.60/x
  3. Step 3: Cross multiply
    1,059.02x = 1,461.24 × 666.60
  4. Step 4: Simplify right side
    1,059.02x = 974,062.58
  5. Step 5: Solve for x
    x = 974,062.58/1,059.02
  6. Step 6: Final answer
    x = 919.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.