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Finding the Fourth Proportional to 2,477.76, 3,419.68 and 1,429.76

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Solution

The fourth proportional to 2,477.76, 3,419.68 and 1,429.76 is: 1,973.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,477.76 : 3,419.68 = 1,429.76 : x
  2. Step 2: Convert to fraction form
    2,477.76/3,419.68 = 1,429.76/x
  3. Step 3: Cross multiply
    2,477.76x = 3,419.68 × 1,429.76
  4. Step 4: Simplify right side
    2,477.76x = 4,889,321.68
  5. Step 5: Solve for x
    x = 4,889,321.68/2,477.76
  6. Step 6: Final answer
    x = 1,973.28

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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.