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Finding the Fourth Proportional to 5,275.78, 7,280.76 and 2,918.14

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Solution

The fourth proportional to 5,275.78, 7,280.76 and 2,918.14 is: 4,027.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.78 : 7,280.76 = 2,918.14 : x
  2. Step 2: Convert to fraction form
    5,275.78/7,280.76 = 2,918.14/x
  3. Step 3: Cross multiply
    5,275.78x = 7,280.76 × 2,918.14
  4. Step 4: Simplify right side
    5,275.78x = 21,246,276.99
  5. Step 5: Solve for x
    x = 21,246,276.99/5,275.78
  6. Step 6: Final answer
    x = 4,027.13

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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.