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Finding the Fourth Proportional to 1,094.48, 1,640.70 and 400.98

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Solution

The fourth proportional to 1,094.48, 1,640.70 and 400.98 is: 601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.48 : 1,640.70 = 400.98 : x
  2. Step 2: Convert to fraction form
    1,094.48/1,640.70 = 400.98/x
  3. Step 3: Cross multiply
    1,094.48x = 1,640.70 × 400.98
  4. Step 4: Simplify right side
    1,094.48x = 657,887.89
  5. Step 5: Solve for x
    x = 657,887.89/1,094.48
  6. Step 6: Final answer
    x = 601.10

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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.