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Finding the Fourth Proportional to 570,794.22, 855,915.21 and 210,721.05

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Solution

The fourth proportional to 570,794.22, 855,915.21 and 210,721.05 is: 315,979.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,794.22 : 855,915.21 = 210,721.05 : x
  2. Step 2: Convert to fraction form
    570,794.22/855,915.21 = 210,721.05/x
  3. Step 3: Cross multiply
    570,794.22x = 855,915.21 × 210,721.05
  4. Step 4: Simplify right side
    570,794.22x = 180,359,351,762.17
  5. Step 5: Solve for x
    x = 180,359,351,762.17/570,794.22
  6. Step 6: Final answer
    x = 315,979.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.