Home / 1,545.02-2,131.54-985.51

Finding the Fourth Proportional to 1,545.02, 2,131.54 and 985.51

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Solution

The fourth proportional to 1,545.02, 2,131.54 and 985.51 is: 1,359.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.02 : 2,131.54 = 985.51 : x
  2. Step 2: Convert to fraction form
    1,545.02/2,131.54 = 985.51/x
  3. Step 3: Cross multiply
    1,545.02x = 2,131.54 × 985.51
  4. Step 4: Simplify right side
    1,545.02x = 2,100,646.19
  5. Step 5: Solve for x
    x = 2,100,646.19/1,545.02
  6. Step 6: Final answer
    x = 1,359.63

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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.