Home / 1,276.47-1,914.72-618.21

Finding the Fourth Proportional to 1,276.47, 1,914.72 and 618.21

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Solution

The fourth proportional to 1,276.47, 1,914.72 and 618.21 is: 927.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.47 : 1,914.72 = 618.21 : x
  2. Step 2: Convert to fraction form
    1,276.47/1,914.72 = 618.21/x
  3. Step 3: Cross multiply
    1,276.47x = 1,914.72 × 618.21
  4. Step 4: Simplify right side
    1,276.47x = 1,183,700.21
  5. Step 5: Solve for x
    x = 1,183,700.21/1,276.47
  6. Step 6: Final answer
    x = 927.32

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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.