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Finding the Fourth Proportional to 425,386.08, 638,074.80 and 188,663.04

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Solution

The fourth proportional to 425,386.08, 638,074.80 and 188,663.04 is: 282,992.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,386.08 : 638,074.80 = 188,663.04 : x
  2. Step 2: Convert to fraction form
    425,386.08/638,074.80 = 188,663.04/x
  3. Step 3: Cross multiply
    425,386.08x = 638,074.80 × 188,663.04
  4. Step 4: Simplify right side
    425,386.08x = 120,381,131,515.39
  5. Step 5: Solve for x
    x = 120,381,131,515.39/425,386.08
  6. Step 6: Final answer
    x = 282,992.64

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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.