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Finding the Fourth Proportional to 359,687.40, 496,063.89 and 216,420.72

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Solution

The fourth proportional to 359,687.40, 496,063.89 and 216,420.72 is: 298,477.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,687.40 : 496,063.89 = 216,420.72 : x
  2. Step 2: Convert to fraction form
    359,687.40/496,063.89 = 216,420.72/x
  3. Step 3: Cross multiply
    359,687.40x = 496,063.89 × 216,420.72
  4. Step 4: Simplify right side
    359,687.40x = 107,358,504,239.80
  5. Step 5: Solve for x
    x = 107,358,504,239.80/359,687.40
  6. Step 6: Final answer
    x = 298,477.25

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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.