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Finding the Fourth Proportional to 666,881.48, 920,296.34 and 360,957.78

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Solution

The fourth proportional to 666,881.48, 920,296.34 and 360,957.78 is: 498,121.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,881.48 : 920,296.34 = 360,957.78 : x
  2. Step 2: Convert to fraction form
    666,881.48/920,296.34 = 360,957.78/x
  3. Step 3: Cross multiply
    666,881.48x = 920,296.34 × 360,957.78
  4. Step 4: Simplify right side
    666,881.48x = 332,188,123,377.33
  5. Step 5: Solve for x
    x = 332,188,123,377.33/666,881.48
  6. Step 6: Final answer
    x = 498,121.68

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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.