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Finding the Fourth Proportional to 2,625.21, 3,938.02 and 870.14

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Solution

The fourth proportional to 2,625.21, 3,938.02 and 870.14 is: 1,305.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.21 : 3,938.02 = 870.14 : x
  2. Step 2: Convert to fraction form
    2,625.21/3,938.02 = 870.14/x
  3. Step 3: Cross multiply
    2,625.21x = 3,938.02 × 870.14
  4. Step 4: Simplify right side
    2,625.21x = 3,426,628.72
  5. Step 5: Solve for x
    x = 3,426,628.72/2,625.21
  6. Step 6: Final answer
    x = 1,305.28

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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.