Home / 1,572.36-2,170.20-983.28

Finding the Fourth Proportional to 1,572.36, 2,170.20 and 983.28

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Solution

The fourth proportional to 1,572.36, 2,170.20 and 983.28 is: 1,357.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.36 : 2,170.20 = 983.28 : x
  2. Step 2: Convert to fraction form
    1,572.36/2,170.20 = 983.28/x
  3. Step 3: Cross multiply
    1,572.36x = 2,170.20 × 983.28
  4. Step 4: Simplify right side
    1,572.36x = 2,133,914.26
  5. Step 5: Solve for x
    x = 2,133,914.26/1,572.36
  6. Step 6: Final answer
    x = 1,357.14

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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.