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Finding the Fourth Proportional to 319,424.60, 478,829.70 and 248,307.80

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Solution

The fourth proportional to 319,424.60, 478,829.70 and 248,307.80 is: 372,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,424.60 : 478,829.70 = 248,307.80 : x
  2. Step 2: Convert to fraction form
    319,424.60/478,829.70 = 248,307.80/x
  3. Step 3: Cross multiply
    319,424.60x = 478,829.70 × 248,307.80
  4. Step 4: Simplify right side
    319,424.60x = 118,897,149,381.66
  5. Step 5: Solve for x
    x = 118,897,149,381.66/319,424.60
  6. Step 6: Final answer
    x = 372,222.90

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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.