Home / 3,130.47-4,320.27-1,803.78

Finding the Fourth Proportional to 3,130.47, 4,320.27 and 1,803.78

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Solution

The fourth proportional to 3,130.47, 4,320.27 and 1,803.78 is: 2,489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.47 : 4,320.27 = 1,803.78 : x
  2. Step 2: Convert to fraction form
    3,130.47/4,320.27 = 1,803.78/x
  3. Step 3: Cross multiply
    3,130.47x = 4,320.27 × 1,803.78
  4. Step 4: Simplify right side
    3,130.47x = 7,792,816.62
  5. Step 5: Solve for x
    x = 7,792,816.62/3,130.47
  6. Step 6: Final answer
    x = 2,489.34

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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.