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Finding the Fourth Proportional to 2,935.12, 4,402.74 and 986.92

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Solution

The fourth proportional to 2,935.12, 4,402.74 and 986.92 is: 1,480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,935.12 : 4,402.74 = 986.92 : x
  2. Step 2: Convert to fraction form
    2,935.12/4,402.74 = 986.92/x
  3. Step 3: Cross multiply
    2,935.12x = 4,402.74 × 986.92
  4. Step 4: Simplify right side
    2,935.12x = 4,345,152.16
  5. Step 5: Solve for x
    x = 4,345,152.16/2,935.12
  6. Step 6: Final answer
    x = 1,480.40

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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.