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Finding the Fourth Proportional to 669,015.71, 923,208 and 397,095.47

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Solution

The fourth proportional to 669,015.71, 923,208 and 397,095.47 is: 547,971.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,015.71 : 923,208 = 397,095.47 : x
  2. Step 2: Convert to fraction form
    669,015.71/923,208 = 397,095.47/x
  3. Step 3: Cross multiply
    669,015.71x = 923,208 × 397,095.47
  4. Step 4: Simplify right side
    669,015.71x = 366,601,714,667.76
  5. Step 5: Solve for x
    x = 366,601,714,667.76/669,015.71
  6. Step 6: Final answer
    x = 547,971.76

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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.