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Finding the Fourth Proportional to 889,893.12, 1,334,828.48 and 215,980

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Solution

The fourth proportional to 889,893.12, 1,334,828.48 and 215,980 is: 323,967.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,893.12 : 1,334,828.48 = 215,980 : x
  2. Step 2: Convert to fraction form
    889,893.12/1,334,828.48 = 215,980/x
  3. Step 3: Cross multiply
    889,893.12x = 1,334,828.48 × 215,980
  4. Step 4: Simplify right side
    889,893.12x = 288,296,255,110.40
  5. Step 5: Solve for x
    x = 288,296,255,110.40/889,893.12
  6. Step 6: Final answer
    x = 323,967.28

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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.