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Finding the Fourth Proportional to 5,287.84, 7,930.99 and 1,392.24

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Solution

The fourth proportional to 5,287.84, 7,930.99 and 1,392.24 is: 2,088.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.84 : 7,930.99 = 1,392.24 : x
  2. Step 2: Convert to fraction form
    5,287.84/7,930.99 = 1,392.24/x
  3. Step 3: Cross multiply
    5,287.84x = 7,930.99 × 1,392.24
  4. Step 4: Simplify right side
    5,287.84x = 11,041,838.04
  5. Step 5: Solve for x
    x = 11,041,838.04/5,287.84
  6. Step 6: Final answer
    x = 2,088.16

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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.