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Finding the Fourth Proportional to 286,612.74, 395,522.70 and 159,285.78

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Solution

The fourth proportional to 286,612.74, 395,522.70 and 159,285.78 is: 219,812.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,612.74 : 395,522.70 = 159,285.78 : x
  2. Step 2: Convert to fraction form
    286,612.74/395,522.70 = 159,285.78/x
  3. Step 3: Cross multiply
    286,612.74x = 395,522.70 × 159,285.78
  4. Step 4: Simplify right side
    286,612.74x = 63,001,141,777.21
  5. Step 5: Solve for x
    x = 63,001,141,777.21/286,612.74
  6. Step 6: Final answer
    x = 219,812.78

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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.