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Finding the Fourth Proportional to 889,459.80, 1,333,728.90 and 328,205.40

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Solution

The fourth proportional to 889,459.80, 1,333,728.90 and 328,205.40 is: 492,138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,459.80 : 1,333,728.90 = 328,205.40 : x
  2. Step 2: Convert to fraction form
    889,459.80/1,333,728.90 = 328,205.40/x
  3. Step 3: Cross multiply
    889,459.80x = 1,333,728.90 × 328,205.40
  4. Step 4: Simplify right side
    889,459.80x = 437,737,027,116.06
  5. Step 5: Solve for x
    x = 437,737,027,116.06/889,459.80
  6. Step 6: Final answer
    x = 492,138.07

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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.