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Finding the Fourth Proportional to 1,640.10, 2,460.60 and 666.88

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Solution

The fourth proportional to 1,640.10, 2,460.60 and 666.88 is: 1,000.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.10 : 2,460.60 = 666.88 : x
  2. Step 2: Convert to fraction form
    1,640.10/2,460.60 = 666.88/x
  3. Step 3: Cross multiply
    1,640.10x = 2,460.60 × 666.88
  4. Step 4: Simplify right side
    1,640.10x = 1,640,924.93
  5. Step 5: Solve for x
    x = 1,640,924.93/1,640.10
  6. Step 6: Final answer
    x = 1,000.50

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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.