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Finding the Fourth Proportional to 697,204.78, 962,142.60 and 395,398.78

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Solution

The fourth proportional to 697,204.78, 962,142.60 and 395,398.78 is: 545,650.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,204.78 : 962,142.60 = 395,398.78 : x
  2. Step 2: Convert to fraction form
    697,204.78/962,142.60 = 395,398.78/x
  3. Step 3: Cross multiply
    697,204.78x = 962,142.60 × 395,398.78
  4. Step 4: Simplify right side
    697,204.78x = 380,430,010,226.03
  5. Step 5: Solve for x
    x = 380,430,010,226.03/697,204.78
  6. Step 6: Final answer
    x = 545,650.32

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.