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Finding the Fourth Proportional to 1,373.06, 1,894.86 and 783.74

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Solution

The fourth proportional to 1,373.06, 1,894.86 and 783.74 is: 1,081.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.06 : 1,894.86 = 783.74 : x
  2. Step 2: Convert to fraction form
    1,373.06/1,894.86 = 783.74/x
  3. Step 3: Cross multiply
    1,373.06x = 1,894.86 × 783.74
  4. Step 4: Simplify right side
    1,373.06x = 1,485,077.58
  5. Step 5: Solve for x
    x = 1,485,077.58/1,373.06
  6. Step 6: Final answer
    x = 1,081.58

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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.