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Finding the Fourth Proportional to 536,401.20, 805,055.40 and 221,084.40

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Solution

The fourth proportional to 536,401.20, 805,055.40 and 221,084.40 is: 331,813.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,401.20 : 805,055.40 = 221,084.40 : x
  2. Step 2: Convert to fraction form
    536,401.20/805,055.40 = 221,084.40/x
  3. Step 3: Cross multiply
    536,401.20x = 805,055.40 × 221,084.40
  4. Step 4: Simplify right side
    536,401.20x = 177,985,190,075.76
  5. Step 5: Solve for x
    x = 177,985,190,075.76/536,401.20
  6. Step 6: Final answer
    x = 331,813.56

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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.