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Finding the Fourth Proportional to 318,989.40, 478,484.46 and 299,503.14

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Solution

The fourth proportional to 318,989.40, 478,484.46 and 299,503.14 is: 449,255.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,989.40 : 478,484.46 = 299,503.14 : x
  2. Step 2: Convert to fraction form
    318,989.40/478,484.46 = 299,503.14/x
  3. Step 3: Cross multiply
    318,989.40x = 478,484.46 × 299,503.14
  4. Step 4: Simplify right side
    318,989.40x = 143,307,598,211.20
  5. Step 5: Solve for x
    x = 143,307,598,211.20/318,989.40
  6. Step 6: Final answer
    x = 449,255.05

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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.