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Finding the Fourth Proportional to 1,115.45, 1,673.40 and 335.49

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Solution

The fourth proportional to 1,115.45, 1,673.40 and 335.49 is: 503.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.45 : 1,673.40 = 335.49 : x
  2. Step 2: Convert to fraction form
    1,115.45/1,673.40 = 335.49/x
  3. Step 3: Cross multiply
    1,115.45x = 1,673.40 × 335.49
  4. Step 4: Simplify right side
    1,115.45x = 561,411.00
  5. Step 5: Solve for x
    x = 561,411.00/1,115.45
  6. Step 6: Final answer
    x = 503.31

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.