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Finding the Fourth Proportional to 611,506.70, 917,369.40 and 256,556.60

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Solution

The fourth proportional to 611,506.70, 917,369.40 and 256,556.60 is: 384,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,506.70 : 917,369.40 = 256,556.60 : x
  2. Step 2: Convert to fraction form
    611,506.70/917,369.40 = 256,556.60/x
  3. Step 3: Cross multiply
    611,506.70x = 917,369.40 × 256,556.60
  4. Step 4: Simplify right side
    611,506.70x = 235,357,174,208.04
  5. Step 5: Solve for x
    x = 235,357,174,208.04/611,506.70
  6. Step 6: Final answer
    x = 384,880.78

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1.5x scale

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.