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Finding the Fourth Proportional to 428,274.72, 639,224.28 and 371,093.04

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Solution

The fourth proportional to 428,274.72, 639,224.28 and 371,093.04 is: 553,877.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,274.72 : 639,224.28 = 371,093.04 : x
  2. Step 2: Convert to fraction form
    428,274.72/639,224.28 = 371,093.04/x
  3. Step 3: Cross multiply
    428,274.72x = 639,224.28 × 371,093.04
  4. Step 4: Simplify right side
    428,274.72x = 237,211,681,307.01
  5. Step 5: Solve for x
    x = 237,211,681,307.01/428,274.72
  6. Step 6: Final answer
    x = 553,877.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.