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Finding the Fourth Proportional to 3,364, 5,047.28 and 1,312.16

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Solution

The fourth proportional to 3,364, 5,047.28 and 1,312.16 is: 1,968.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,364 : 5,047.28 = 1,312.16 : x
  2. Step 2: Convert to fraction form
    3,364/5,047.28 = 1,312.16/x
  3. Step 3: Cross multiply
    3,364x = 5,047.28 × 1,312.16
  4. Step 4: Simplify right side
    3,364x = 6,622,838.92
  5. Step 5: Solve for x
    x = 6,622,838.92/3,364
  6. Step 6: Final answer
    x = 1,968.74

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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.