Home / 1,385.84-1,914.36-1,376.12

Finding the Fourth Proportional to 1,385.84, 1,914.36 and 1,376.12

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Solution

The fourth proportional to 1,385.84, 1,914.36 and 1,376.12 is: 1,900.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.84 : 1,914.36 = 1,376.12 : x
  2. Step 2: Convert to fraction form
    1,385.84/1,914.36 = 1,376.12/x
  3. Step 3: Cross multiply
    1,385.84x = 1,914.36 × 1,376.12
  4. Step 4: Simplify right side
    1,385.84x = 2,634,389.08
  5. Step 5: Solve for x
    x = 2,634,389.08/1,385.84
  6. Step 6: Final answer
    x = 1,900.93

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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.