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Finding the Fourth Proportional to 318,779.71, 439,915.28 and 173,583.23

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Solution

The fourth proportional to 318,779.71, 439,915.28 and 173,583.23 is: 239,544.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,779.71 : 439,915.28 = 173,583.23 : x
  2. Step 2: Convert to fraction form
    318,779.71/439,915.28 = 173,583.23/x
  3. Step 3: Cross multiply
    318,779.71x = 439,915.28 × 173,583.23
  4. Step 4: Simplify right side
    318,779.71x = 76,361,912,161.26
  5. Step 5: Solve for x
    x = 76,361,912,161.26/318,779.71
  6. Step 6: Final answer
    x = 239,544.46

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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.