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Finding the Fourth Proportional to 1,098.78, 1,648.48 and 368.26

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Solution

The fourth proportional to 1,098.78, 1,648.48 and 368.26 is: 552.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.78 : 1,648.48 = 368.26 : x
  2. Step 2: Convert to fraction form
    1,098.78/1,648.48 = 368.26/x
  3. Step 3: Cross multiply
    1,098.78x = 1,648.48 × 368.26
  4. Step 4: Simplify right side
    1,098.78x = 607,069.24
  5. Step 5: Solve for x
    x = 607,069.24/1,098.78
  6. Step 6: Final answer
    x = 552.49

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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.