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Finding the Fourth Proportional to 425,268.30, 638,852.85 and 355,284.30

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Solution

The fourth proportional to 425,268.30, 638,852.85 and 355,284.30 is: 533,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,268.30 : 638,852.85 = 355,284.30 : x
  2. Step 2: Convert to fraction form
    425,268.30/638,852.85 = 355,284.30/x
  3. Step 3: Cross multiply
    425,268.30x = 638,852.85 × 355,284.30
  4. Step 4: Simplify right side
    425,268.30x = 226,974,387,615.26
  5. Step 5: Solve for x
    x = 226,974,387,615.26/425,268.30
  6. Step 6: Final answer
    x = 533,720.45

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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.