Home / 2,930.40-4,357.91-2,838.12

Finding the Fourth Proportional to 2,930.40, 4,357.91 and 2,838.12

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Solution

The fourth proportional to 2,930.40, 4,357.91 and 2,838.12 is: 4,220.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.40 : 4,357.91 = 2,838.12 : x
  2. Step 2: Convert to fraction form
    2,930.40/4,357.91 = 2,838.12/x
  3. Step 3: Cross multiply
    2,930.40x = 4,357.91 × 2,838.12
  4. Step 4: Simplify right side
    2,930.40x = 12,368,271.53
  5. Step 5: Solve for x
    x = 12,368,271.53/2,930.40
  6. Step 6: Final answer
    x = 4,220.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.