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Finding the Fourth Proportional to 370,666.52, 511,514.25 and 209,515.90

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Solution

The fourth proportional to 370,666.52, 511,514.25 and 209,515.90 is: 289,128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,666.52 : 511,514.25 = 209,515.90 : x
  2. Step 2: Convert to fraction form
    370,666.52/511,514.25 = 209,515.90/x
  3. Step 3: Cross multiply
    370,666.52x = 511,514.25 × 209,515.90
  4. Step 4: Simplify right side
    370,666.52x = 107,170,368,451.58
  5. Step 5: Solve for x
    x = 107,170,368,451.58/370,666.52
  6. Step 6: Final answer
    x = 289,128.81

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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.