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Finding the Fourth Proportional to 425,633.76, 638,638.71 and 223,181.52

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Solution

The fourth proportional to 425,633.76, 638,638.71 and 223,181.52 is: 334,870.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,633.76 : 638,638.71 = 223,181.52 : x
  2. Step 2: Convert to fraction form
    425,633.76/638,638.71 = 223,181.52/x
  3. Step 3: Cross multiply
    425,633.76x = 638,638.71 × 223,181.52
  4. Step 4: Simplify right side
    425,633.76x = 142,532,358,028.64
  5. Step 5: Solve for x
    x = 142,532,358,028.64/425,633.76
  6. Step 6: Final answer
    x = 334,870.89

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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.