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Finding the Fourth Proportional to 329,907.89, 455,321.55 and 209,060.19

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Solution

The fourth proportional to 329,907.89, 455,321.55 and 209,060.19 is: 288,533.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,907.89 : 455,321.55 = 209,060.19 : x
  2. Step 2: Convert to fraction form
    329,907.89/455,321.55 = 209,060.19/x
  3. Step 3: Cross multiply
    329,907.89x = 455,321.55 × 209,060.19
  4. Step 4: Simplify right side
    329,907.89x = 95,189,610,538.07
  5. Step 5: Solve for x
    x = 95,189,610,538.07/329,907.89
  6. Step 6: Final answer
    x = 288,533.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.