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Finding the Fourth Proportional to 353,075.60, 528,922.20 and 212,416.40

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Solution

The fourth proportional to 353,075.60, 528,922.20 and 212,416.40 is: 318,208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,075.60 : 528,922.20 = 212,416.40 : x
  2. Step 2: Convert to fraction form
    353,075.60/528,922.20 = 212,416.40/x
  3. Step 3: Cross multiply
    353,075.60x = 528,922.20 × 212,416.40
  4. Step 4: Simplify right side
    353,075.60x = 112,351,749,604.08
  5. Step 5: Solve for x
    x = 112,351,749,604.08/353,075.60
  6. Step 6: Final answer
    x = 318,208.76

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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.