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Finding the Fourth Proportional to 373,405.20, 560,107.80 and 213,316.80

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Solution

The fourth proportional to 373,405.20, 560,107.80 and 213,316.80 is: 319,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,405.20 : 560,107.80 = 213,316.80 : x
  2. Step 2: Convert to fraction form
    373,405.20/560,107.80 = 213,316.80/x
  3. Step 3: Cross multiply
    373,405.20x = 560,107.80 × 213,316.80
  4. Step 4: Simplify right side
    373,405.20x = 119,480,403,551.04
  5. Step 5: Solve for x
    x = 119,480,403,551.04/373,405.20
  6. Step 6: Final answer
    x = 319,975.20

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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.