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Finding the Fourth Proportional to 1,642.26, 2,461.42 and 947.49

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Solution

The fourth proportional to 1,642.26, 2,461.42 and 947.49 is: 1,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.26 : 2,461.42 = 947.49 : x
  2. Step 2: Convert to fraction form
    1,642.26/2,461.42 = 947.49/x
  3. Step 3: Cross multiply
    1,642.26x = 2,461.42 × 947.49
  4. Step 4: Simplify right side
    1,642.26x = 2,332,170.84
  5. Step 5: Solve for x
    x = 2,332,170.84/1,642.26
  6. Step 6: Final answer
    x = 1,420.10

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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.