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Finding the Fourth Proportional to 319,072.40, 478,439.30 and 94,401.89

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Solution

The fourth proportional to 319,072.40, 478,439.30 and 94,401.89 is: 141,552.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,072.40 : 478,439.30 = 94,401.89 : x
  2. Step 2: Convert to fraction form
    319,072.40/478,439.30 = 94,401.89/x
  3. Step 3: Cross multiply
    319,072.40x = 478,439.30 × 94,401.89
  4. Step 4: Simplify right side
    319,072.40x = 45,165,571,306.07
  5. Step 5: Solve for x
    x = 45,165,571,306.07/319,072.40
  6. Step 6: Final answer
    x = 141,552.74

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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.