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Finding the Fourth Proportional to 630,373.75, 869,915.78 and 404,019.25

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Solution

The fourth proportional to 630,373.75, 869,915.78 and 404,019.25 is: 557,546.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,373.75 : 869,915.78 = 404,019.25 : x
  2. Step 2: Convert to fraction form
    630,373.75/869,915.78 = 404,019.25/x
  3. Step 3: Cross multiply
    630,373.75x = 869,915.78 × 404,019.25
  4. Step 4: Simplify right side
    630,373.75x = 351,462,718,978.67
  5. Step 5: Solve for x
    x = 351,462,718,978.67/630,373.75
  6. Step 6: Final answer
    x = 557,546.57

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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.