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Finding the Fourth Proportional to 421,805.25, 632,577.68 and 122,307.90

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Solution

The fourth proportional to 421,805.25, 632,577.68 and 122,307.90 is: 183,424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,805.25 : 632,577.68 = 122,307.90 : x
  2. Step 2: Convert to fraction form
    421,805.25/632,577.68 = 122,307.90/x
  3. Step 3: Cross multiply
    421,805.25x = 632,577.68 × 122,307.90
  4. Step 4: Simplify right side
    421,805.25x = 77,369,247,627.67
  5. Step 5: Solve for x
    x = 77,369,247,627.67/421,805.25
  6. Step 6: Final answer
    x = 183,424.10

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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.