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Finding the Fourth Proportional to 2,921.70, 4,382.77 and 973.90

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Solution

The fourth proportional to 2,921.70, 4,382.77 and 973.90 is: 1,460.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.70 : 4,382.77 = 973.90 : x
  2. Step 2: Convert to fraction form
    2,921.70/4,382.77 = 973.90/x
  3. Step 3: Cross multiply
    2,921.70x = 4,382.77 × 973.90
  4. Step 4: Simplify right side
    2,921.70x = 4,268,373.62
  5. Step 5: Solve for x
    x = 4,268,373.62/2,921.70
  6. Step 6: Final answer
    x = 1,460.92

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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.