Home / 1,972.90-2,722.47-1,088.70

Finding the Fourth Proportional to 1,972.90, 2,722.47 and 1,088.70

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Solution

The fourth proportional to 1,972.90, 2,722.47 and 1,088.70 is: 1,502.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.90 : 2,722.47 = 1,088.70 : x
  2. Step 2: Convert to fraction form
    1,972.90/2,722.47 = 1,088.70/x
  3. Step 3: Cross multiply
    1,972.90x = 2,722.47 × 1,088.70
  4. Step 4: Simplify right side
    1,972.90x = 2,963,953.09
  5. Step 5: Solve for x
    x = 2,963,953.09/1,972.90
  6. Step 6: Final answer
    x = 1,502.34

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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.