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Finding the Fourth Proportional to 7,319.34, 10,978.95 and 1,772.71

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Solution

The fourth proportional to 7,319.34, 10,978.95 and 1,772.71 is: 2,659.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.34 : 10,978.95 = 1,772.71 : x
  2. Step 2: Convert to fraction form
    7,319.34/10,978.95 = 1,772.71/x
  3. Step 3: Cross multiply
    7,319.34x = 10,978.95 × 1,772.71
  4. Step 4: Simplify right side
    7,319.34x = 19,462,467.01
  5. Step 5: Solve for x
    x = 19,462,467.01/7,319.34
  6. Step 6: Final answer
    x = 2,659.05

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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.