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Finding the Fourth Proportional to 1,380,779.73, 1,905,091.04 and 890,541.81

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Solution

The fourth proportional to 1,380,779.73, 1,905,091.04 and 890,541.81 is: 1,228,699.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,779.73 : 1,905,091.04 = 890,541.81 : x
  2. Step 2: Convert to fraction form
    1,380,779.73/1,905,091.04 = 890,541.81/x
  3. Step 3: Cross multiply
    1,380,779.73x = 1,905,091.04 × 890,541.81
  4. Step 4: Simplify right side
    1,380,779.73x = 1,696,563,225,202.74
  5. Step 5: Solve for x
    x = 1,696,563,225,202.74/1,380,779.73
  6. Step 6: Final answer
    x = 1,228,699.40

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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.