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Finding the Fourth Proportional to 700,972.77, 967,388.01 and 390,910.34

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Solution

The fourth proportional to 700,972.77, 967,388.01 and 390,910.34 is: 539,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,972.77 : 967,388.01 = 390,910.34 : x
  2. Step 2: Convert to fraction form
    700,972.77/967,388.01 = 390,910.34/x
  3. Step 3: Cross multiply
    700,972.77x = 967,388.01 × 390,910.34
  4. Step 4: Simplify right side
    700,972.77x = 378,161,971,064.08
  5. Step 5: Solve for x
    x = 378,161,971,064.08/700,972.77
  6. Step 6: Final answer
    x = 539,481.68

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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.