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Finding the Fourth Proportional to 612,186.80, 916,465.80 and 455,111.60

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Solution

The fourth proportional to 612,186.80, 916,465.80 and 455,111.60 is: 681,318.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,186.80 : 916,465.80 = 455,111.60 : x
  2. Step 2: Convert to fraction form
    612,186.80/916,465.80 = 455,111.60/x
  3. Step 3: Cross multiply
    612,186.80x = 916,465.80 × 455,111.60
  4. Step 4: Simplify right side
    612,186.80x = 417,094,216,583.28
  5. Step 5: Solve for x
    x = 417,094,216,583.28/612,186.80
  6. Step 6: Final answer
    x = 681,318.54

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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.