Home / 3,390.40-4,678.52-1,898.06

Finding the Fourth Proportional to 3,390.40, 4,678.52 and 1,898.06

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Solution

The fourth proportional to 3,390.40, 4,678.52 and 1,898.06 is: 2,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.40 : 4,678.52 = 1,898.06 : x
  2. Step 2: Convert to fraction form
    3,390.40/4,678.52 = 1,898.06/x
  3. Step 3: Cross multiply
    3,390.40x = 4,678.52 × 1,898.06
  4. Step 4: Simplify right side
    3,390.40x = 8,880,128.11
  5. Step 5: Solve for x
    x = 8,880,128.11/3,390.40
  6. Step 6: Final answer
    x = 2,619.20

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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.