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Finding the Fourth Proportional to 999,840.33, 1,379,745.36 and 570,258.86

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Solution

The fourth proportional to 999,840.33, 1,379,745.36 and 570,258.86 is: 786,937.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,840.33 : 1,379,745.36 = 570,258.86 : x
  2. Step 2: Convert to fraction form
    999,840.33/1,379,745.36 = 570,258.86/x
  3. Step 3: Cross multiply
    999,840.33x = 1,379,745.36 × 570,258.86
  4. Step 4: Simplify right side
    999,840.33x = 786,812,009,185.16
  5. Step 5: Solve for x
    x = 786,812,009,185.16/999,840.33
  6. Step 6: Final answer
    x = 786,937.66

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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.