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Finding the Fourth Proportional to 5,257.65, 7,256.07 and 3,929.05

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Solution

The fourth proportional to 5,257.65, 7,256.07 and 3,929.05 is: 5,422.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,257.65 : 7,256.07 = 3,929.05 : x
  2. Step 2: Convert to fraction form
    5,257.65/7,256.07 = 3,929.05/x
  3. Step 3: Cross multiply
    5,257.65x = 7,256.07 × 3,929.05
  4. Step 4: Simplify right side
    5,257.65x = 28,509,461.83
  5. Step 5: Solve for x
    x = 28,509,461.83/5,257.65
  6. Step 6: Final answer
    x = 5,422.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.