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Finding the Fourth Proportional to 425,842.20, 638,763.30 and 362,516.40

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Solution

The fourth proportional to 425,842.20, 638,763.30 and 362,516.40 is: 543,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,842.20 : 638,763.30 = 362,516.40 : x
  2. Step 2: Convert to fraction form
    425,842.20/638,763.30 = 362,516.40/x
  3. Step 3: Cross multiply
    425,842.20x = 638,763.30 × 362,516.40
  4. Step 4: Simplify right side
    425,842.20x = 231,562,171,968.12
  5. Step 5: Solve for x
    x = 231,562,171,968.12/425,842.20
  6. Step 6: Final answer
    x = 543,774.60

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1.5x scale

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.