Home / 1,678.16-2,315.36-1,327.76

Finding the Fourth Proportional to 1,678.16, 2,315.36 and 1,327.76

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Solution

The fourth proportional to 1,678.16, 2,315.36 and 1,327.76 is: 1,831.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.16 : 2,315.36 = 1,327.76 : x
  2. Step 2: Convert to fraction form
    1,678.16/2,315.36 = 1,327.76/x
  3. Step 3: Cross multiply
    1,678.16x = 2,315.36 × 1,327.76
  4. Step 4: Simplify right side
    1,678.16x = 3,074,242.39
  5. Step 5: Solve for x
    x = 3,074,242.39/1,678.16
  6. Step 6: Final answer
    x = 1,831.91

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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.