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Finding the Fourth Proportional to 3,390.59, 4,678.72 and 1,898.26

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Solution

The fourth proportional to 3,390.59, 4,678.72 and 1,898.26 is: 2,619.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.59 : 4,678.72 = 1,898.26 : x
  2. Step 2: Convert to fraction form
    3,390.59/4,678.72 = 1,898.26/x
  3. Step 3: Cross multiply
    3,390.59x = 4,678.72 × 1,898.26
  4. Step 4: Simplify right side
    3,390.59x = 8,881,410.58
  5. Step 5: Solve for x
    x = 8,881,410.58/3,390.59
  6. Step 6: Final answer
    x = 2,619.43

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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.