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Finding the Fourth Proportional to 1,990,593.60, 2,985,890.40 and 728,462.40

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Solution

The fourth proportional to 1,990,593.60, 2,985,890.40 and 728,462.40 is: 1,092,693.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,593.60 : 2,985,890.40 = 728,462.40 : x
  2. Step 2: Convert to fraction form
    1,990,593.60/2,985,890.40 = 728,462.40/x
  3. Step 3: Cross multiply
    1,990,593.60x = 2,985,890.40 × 728,462.40
  4. Step 4: Simplify right side
    1,990,593.60x = 2,175,108,886,920.96
  5. Step 5: Solve for x
    x = 2,175,108,886,920.96/1,990,593.60
  6. Step 6: Final answer
    x = 1,092,693.60

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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.