Home / 1,685.41-2,325.78-929.32

Finding the Fourth Proportional to 1,685.41, 2,325.78 and 929.32

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Solution

The fourth proportional to 1,685.41, 2,325.78 and 929.32 is: 1,282.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.41 : 2,325.78 = 929.32 : x
  2. Step 2: Convert to fraction form
    1,685.41/2,325.78 = 929.32/x
  3. Step 3: Cross multiply
    1,685.41x = 2,325.78 × 929.32
  4. Step 4: Simplify right side
    1,685.41x = 2,161,388.38
  5. Step 5: Solve for x
    x = 2,161,388.38/1,685.41
  6. Step 6: Final answer
    x = 1,282.41

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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.