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Finding the Fourth Proportional to 421,805.83, 632,578.55 and 122,308.49

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Solution

The fourth proportional to 421,805.83, 632,578.55 and 122,308.49 is: 183,424.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,805.83 : 632,578.55 = 122,308.49 : x
  2. Step 2: Convert to fraction form
    421,805.83/632,578.55 = 122,308.49/x
  3. Step 3: Cross multiply
    421,805.83x = 632,578.55 × 122,308.49
  4. Step 4: Simplify right side
    421,805.83x = 77,369,727,256.89
  5. Step 5: Solve for x
    x = 77,369,727,256.89/421,805.83
  6. Step 6: Final answer
    x = 183,424.98

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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.