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Finding the Fourth Proportional to 5,717.39, 7,890.71 and 3,479.50

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Solution

The fourth proportional to 5,717.39, 7,890.71 and 3,479.50 is: 4,802.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,717.39 : 7,890.71 = 3,479.50 : x
  2. Step 2: Convert to fraction form
    5,717.39/7,890.71 = 3,479.50/x
  3. Step 3: Cross multiply
    5,717.39x = 7,890.71 × 3,479.50
  4. Step 4: Simplify right side
    5,717.39x = 27,455,688.32
  5. Step 5: Solve for x
    x = 27,455,688.32/5,717.39
  6. Step 6: Final answer
    x = 4,802.13

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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.