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Finding the Fourth Proportional to 1,194.19, 1,647.98 and 670.39

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Solution

The fourth proportional to 1,194.19, 1,647.98 and 670.39 is: 925.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.19 : 1,647.98 = 670.39 : x
  2. Step 2: Convert to fraction form
    1,194.19/1,647.98 = 670.39/x
  3. Step 3: Cross multiply
    1,194.19x = 1,647.98 × 670.39
  4. Step 4: Simplify right side
    1,194.19x = 1,104,784.35
  5. Step 5: Solve for x
    x = 1,104,784.35/1,194.19
  6. Step 6: Final answer
    x = 925.13

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Half scale
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Double scale
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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.