Home / 1,385.06-1,913.81-1,107.59

Finding the Fourth Proportional to 1,385.06, 1,913.81 and 1,107.59

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Solution

The fourth proportional to 1,385.06, 1,913.81 and 1,107.59 is: 1,530.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.06 : 1,913.81 = 1,107.59 : x
  2. Step 2: Convert to fraction form
    1,385.06/1,913.81 = 1,107.59/x
  3. Step 3: Cross multiply
    1,385.06x = 1,913.81 × 1,107.59
  4. Step 4: Simplify right side
    1,385.06x = 2,119,701.71
  5. Step 5: Solve for x
    x = 2,119,701.71/1,385.06
  6. Step 6: Final answer
    x = 1,530.41

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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.