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Finding the Fourth Proportional to 353,220.60, 528,621.30 and 213,079.80

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Solution

The fourth proportional to 353,220.60, 528,621.30 and 213,079.80 is: 318,890.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,220.60 : 528,621.30 = 213,079.80 : x
  2. Step 2: Convert to fraction form
    353,220.60/528,621.30 = 213,079.80/x
  3. Step 3: Cross multiply
    353,220.60x = 528,621.30 × 213,079.80
  4. Step 4: Simplify right side
    353,220.60x = 112,638,520,879.74
  5. Step 5: Solve for x
    x = 112,638,520,879.74/353,220.60
  6. Step 6: Final answer
    x = 318,890.01

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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.