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Finding the Fourth Proportional to 675,175.74, 931,857.09 and 388,861.59

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Solution

The fourth proportional to 675,175.74, 931,857.09 and 388,861.59 is: 536,694.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,175.74 : 931,857.09 = 388,861.59 : x
  2. Step 2: Convert to fraction form
    675,175.74/931,857.09 = 388,861.59/x
  3. Step 3: Cross multiply
    675,175.74x = 931,857.09 × 388,861.59
  4. Step 4: Simplify right side
    675,175.74x = 362,363,429,670.17
  5. Step 5: Solve for x
    x = 362,363,429,670.17/675,175.74
  6. Step 6: Final answer
    x = 536,694.98

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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.