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Finding the Fourth Proportional to 685,860.60, 946,477.26 and 384,065.40

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Solution

The fourth proportional to 685,860.60, 946,477.26 and 384,065.40 is: 530,004.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,860.60 : 946,477.26 = 384,065.40 : x
  2. Step 2: Convert to fraction form
    685,860.60/946,477.26 = 384,065.40/x
  3. Step 3: Cross multiply
    685,860.60x = 946,477.26 × 384,065.40
  4. Step 4: Simplify right side
    685,860.60x = 363,509,167,452.80
  5. Step 5: Solve for x
    x = 363,509,167,452.80/685,860.60
  6. Step 6: Final answer
    x = 530,004.45

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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.