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Finding the Fourth Proportional to 1,371,581.91, 1,892,603.68 and 790,826.90

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Solution

The fourth proportional to 1,371,581.91, 1,892,603.68 and 790,826.90 is: 1,091,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371,581.91 : 1,892,603.68 = 790,826.90 : x
  2. Step 2: Convert to fraction form
    1,371,581.91/1,892,603.68 = 790,826.90/x
  3. Step 3: Cross multiply
    1,371,581.91x = 1,892,603.68 × 790,826.90
  4. Step 4: Simplify right side
    1,371,581.91x = 1,496,721,889,742.91
  5. Step 5: Solve for x
    x = 1,496,721,889,742.91/1,371,581.91
  6. Step 6: Final answer
    x = 1,091,237.70

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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.