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Finding the Fourth Proportional to 1,985,658.30, 2,977,029.45 and 786,987.90

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Solution

The fourth proportional to 1,985,658.30, 2,977,029.45 and 786,987.90 is: 1,179,903.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,658.30 : 2,977,029.45 = 786,987.90 : x
  2. Step 2: Convert to fraction form
    1,985,658.30/2,977,029.45 = 786,987.90/x
  3. Step 3: Cross multiply
    1,985,658.30x = 2,977,029.45 × 786,987.90
  4. Step 4: Simplify right side
    1,985,658.30x = 2,342,886,155,093.66
  5. Step 5: Solve for x
    x = 2,342,886,155,093.66/1,985,658.30
  6. Step 6: Final answer
    x = 1,179,903.99

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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.