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Finding the Fourth Proportional to 674,296.89, 930,556.44 and 387,816.63

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Solution

The fourth proportional to 674,296.89, 930,556.44 and 387,816.63 is: 535,202.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,296.89 : 930,556.44 = 387,816.63 : x
  2. Step 2: Convert to fraction form
    674,296.89/930,556.44 = 387,816.63/x
  3. Step 3: Cross multiply
    674,296.89x = 930,556.44 × 387,816.63
  4. Step 4: Simplify right side
    674,296.89x = 360,885,262,585.60
  5. Step 5: Solve for x
    x = 360,885,262,585.60/674,296.89
  6. Step 6: Final answer
    x = 535,202.32

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Double scale
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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.