Home / 2,121.85-2,930.81-1,630.45

Finding the Fourth Proportional to 2,121.85, 2,930.81 and 1,630.45

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Solution

The fourth proportional to 2,121.85, 2,930.81 and 1,630.45 is: 2,252.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.85 : 2,930.81 = 1,630.45 : x
  2. Step 2: Convert to fraction form
    2,121.85/2,930.81 = 1,630.45/x
  3. Step 3: Cross multiply
    2,121.85x = 2,930.81 × 1,630.45
  4. Step 4: Simplify right side
    2,121.85x = 4,778,547.50
  5. Step 5: Solve for x
    x = 4,778,547.50/2,121.85
  6. Step 6: Final answer
    x = 2,252.07

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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.