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Finding the Fourth Proportional to 1,962.81, 2,944.35 and 646.71

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Solution

The fourth proportional to 1,962.81, 2,944.35 and 646.71 is: 970.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,962.81 : 2,944.35 = 646.71 : x
  2. Step 2: Convert to fraction form
    1,962.81/2,944.35 = 646.71/x
  3. Step 3: Cross multiply
    1,962.81x = 2,944.35 × 646.71
  4. Step 4: Simplify right side
    1,962.81x = 1,904,140.59
  5. Step 5: Solve for x
    x = 1,904,140.59/1,962.81
  6. Step 6: Final answer
    x = 970.11

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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.