Home / 1,574.18-2,172.39-875.57

Finding the Fourth Proportional to 1,574.18, 2,172.39 and 875.57

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Solution

The fourth proportional to 1,574.18, 2,172.39 and 875.57 is: 1,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.18 : 2,172.39 = 875.57 : x
  2. Step 2: Convert to fraction form
    1,574.18/2,172.39 = 875.57/x
  3. Step 3: Cross multiply
    1,574.18x = 2,172.39 × 875.57
  4. Step 4: Simplify right side
    1,574.18x = 1,902,079.51
  5. Step 5: Solve for x
    x = 1,902,079.51/1,574.18
  6. Step 6: Final answer
    x = 1,208.30

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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.