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Finding the Fourth Proportional to 253,307.91, 379,821.47 and 103,653.12

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Solution

The fourth proportional to 253,307.91, 379,821.47 and 103,653.12 is: 155,422.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,307.91 : 379,821.47 = 103,653.12 : x
  2. Step 2: Convert to fraction form
    253,307.91/379,821.47 = 103,653.12/x
  3. Step 3: Cross multiply
    253,307.91x = 379,821.47 × 103,653.12
  4. Step 4: Simplify right side
    253,307.91x = 39,369,679,890.22
  5. Step 5: Solve for x
    x = 39,369,679,890.22/253,307.91
  6. Step 6: Final answer
    x = 155,422.23

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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.