Home / 919,920.30-1,379,880.45-415,051.35

Finding the Fourth Proportional to 919,920.30, 1,379,880.45 and 415,051.35

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Solution

The fourth proportional to 919,920.30, 1,379,880.45 and 415,051.35 is: 622,577.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,920.30 : 1,379,880.45 = 415,051.35 : x
  2. Step 2: Convert to fraction form
    919,920.30/1,379,880.45 = 415,051.35/x
  3. Step 3: Cross multiply
    919,920.30x = 1,379,880.45 × 415,051.35
  4. Step 4: Simplify right side
    919,920.30x = 572,721,243,611.11
  5. Step 5: Solve for x
    x = 572,721,243,611.11/919,920.30
  6. Step 6: Final answer
    x = 622,577.03

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Double scale
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Similar ratio
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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.