Home / 1,574.54-2,172.86-985.11

Finding the Fourth Proportional to 1,574.54, 2,172.86 and 985.11

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Solution

The fourth proportional to 1,574.54, 2,172.86 and 985.11 is: 1,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.54 : 2,172.86 = 985.11 : x
  2. Step 2: Convert to fraction form
    1,574.54/2,172.86 = 985.11/x
  3. Step 3: Cross multiply
    1,574.54x = 2,172.86 × 985.11
  4. Step 4: Simplify right side
    1,574.54x = 2,140,501.19
  5. Step 5: Solve for x
    x = 2,140,501.19/1,574.54
  6. Step 6: Final answer
    x = 1,359.45

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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.