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Finding the Fourth Proportional to 359,915.56, 496,661.70 and 216,721.96

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Solution

The fourth proportional to 359,915.56, 496,661.70 and 216,721.96 is: 299,063.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,915.56 : 496,661.70 = 216,721.96 : x
  2. Step 2: Convert to fraction form
    359,915.56/496,661.70 = 216,721.96/x
  3. Step 3: Cross multiply
    359,915.56x = 496,661.70 × 216,721.96
  4. Step 4: Simplify right side
    359,915.56x = 107,637,497,080.93
  5. Step 5: Solve for x
    x = 107,637,497,080.93/359,915.56
  6. Step 6: Final answer
    x = 299,063.19

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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.