Home / 1,509.40-2,083.98-985.24

Finding the Fourth Proportional to 1,509.40, 2,083.98 and 985.24

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Solution

The fourth proportional to 1,509.40, 2,083.98 and 985.24 is: 1,360.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.40 : 2,083.98 = 985.24 : x
  2. Step 2: Convert to fraction form
    1,509.40/2,083.98 = 985.24/x
  3. Step 3: Cross multiply
    1,509.40x = 2,083.98 × 985.24
  4. Step 4: Simplify right side
    1,509.40x = 2,053,220.46
  5. Step 5: Solve for x
    x = 2,053,220.46/1,509.40
  6. Step 6: Final answer
    x = 1,360.29

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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.