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Finding the Fourth Proportional to 347,503.43, 479,307.46 and 318,915.43

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Solution

The fourth proportional to 347,503.43, 479,307.46 and 318,915.43 is: 439,876.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,503.43 : 479,307.46 = 318,915.43 : x
  2. Step 2: Convert to fraction form
    347,503.43/479,307.46 = 318,915.43/x
  3. Step 3: Cross multiply
    347,503.43x = 479,307.46 × 318,915.43
  4. Step 4: Simplify right side
    347,503.43x = 152,858,544,708.11
  5. Step 5: Solve for x
    x = 152,858,544,708.11/347,503.43
  6. Step 6: Final answer
    x = 439,876.36

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1.5x scale

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.