Home / 1,970.12-2,718.78-1,528.62

Finding the Fourth Proportional to 1,970.12, 2,718.78 and 1,528.62

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Solution

The fourth proportional to 1,970.12, 2,718.78 and 1,528.62 is: 2,109.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.12 : 2,718.78 = 1,528.62 : x
  2. Step 2: Convert to fraction form
    1,970.12/2,718.78 = 1,528.62/x
  3. Step 3: Cross multiply
    1,970.12x = 2,718.78 × 1,528.62
  4. Step 4: Simplify right side
    1,970.12x = 4,155,981.48
  5. Step 5: Solve for x
    x = 4,155,981.48/1,970.12
  6. Step 6: Final answer
    x = 2,109.51

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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.