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Finding the Fourth Proportional to 1,985,038.07, 2,977,852.34 and 920,187.77

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Solution

The fourth proportional to 1,985,038.07, 2,977,852.34 and 920,187.77 is: 1,380,418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,038.07 : 2,977,852.34 = 920,187.77 : x
  2. Step 2: Convert to fraction form
    1,985,038.07/2,977,852.34 = 920,187.77/x
  3. Step 3: Cross multiply
    1,985,038.07x = 2,977,852.34 × 920,187.77
  4. Step 4: Simplify right side
    1,985,038.07x = 2,740,183,291,545.09
  5. Step 5: Solve for x
    x = 2,740,183,291,545.09/1,985,038.07
  6. Step 6: Final answer
    x = 1,380,418.51

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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.