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Finding the Fourth Proportional to 552,809.76, 762,916.20 and 311,115.60

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Solution

The fourth proportional to 552,809.76, 762,916.20 and 311,115.60 is: 429,361.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,809.76 : 762,916.20 = 311,115.60 : x
  2. Step 2: Convert to fraction form
    552,809.76/762,916.20 = 311,115.60/x
  3. Step 3: Cross multiply
    552,809.76x = 762,916.20 × 311,115.60
  4. Step 4: Simplify right side
    552,809.76x = 237,355,131,312.72
  5. Step 5: Solve for x
    x = 237,355,131,312.72/552,809.76
  6. Step 6: Final answer
    x = 429,361.33

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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.