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Finding the Fourth Proportional to 366,397, 505,627.86 and 207,421

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Solution

The fourth proportional to 366,397, 505,627.86 and 207,421 is: 286,240.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,397 : 505,627.86 = 207,421 : x
  2. Step 2: Convert to fraction form
    366,397/505,627.86 = 207,421/x
  3. Step 3: Cross multiply
    366,397x = 505,627.86 × 207,421
  4. Step 4: Simplify right side
    366,397x = 104,877,836,349.06
  5. Step 5: Solve for x
    x = 104,877,836,349.06/366,397
  6. Step 6: Final answer
    x = 286,240.98

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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.