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Finding the Fourth Proportional to 1,985,797.86, 2,979,702.80 and 906,190.77

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Solution

The fourth proportional to 1,985,797.86, 2,979,702.80 and 906,190.77 is: 1,359,745.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,797.86 : 2,979,702.80 = 906,190.77 : x
  2. Step 2: Convert to fraction form
    1,985,797.86/2,979,702.80 = 906,190.77/x
  3. Step 3: Cross multiply
    1,985,797.86x = 2,979,702.80 × 906,190.77
  4. Step 4: Simplify right side
    1,985,797.86x = 2,700,179,174,703.16
  5. Step 5: Solve for x
    x = 2,700,179,174,703.16/1,985,797.86
  6. Step 6: Final answer
    x = 1,359,745.24

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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.