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Finding the Fourth Proportional to 644,055.80, 966,083.70 and 378,116.60

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Solution

The fourth proportional to 644,055.80, 966,083.70 and 378,116.60 is: 567,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,055.80 : 966,083.70 = 378,116.60 : x
  2. Step 2: Convert to fraction form
    644,055.80/966,083.70 = 378,116.60/x
  3. Step 3: Cross multiply
    644,055.80x = 966,083.70 × 378,116.60
  4. Step 4: Simplify right side
    644,055.80x = 365,292,283,959.42
  5. Step 5: Solve for x
    x = 365,292,283,959.42/644,055.80
  6. Step 6: Final answer
    x = 567,174.90

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Double scale
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Similar ratio
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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.