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Finding the Fourth Proportional to 421,862.40, 632,693.76 and 122,263.68

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Solution

The fourth proportional to 421,862.40, 632,693.76 and 122,263.68 is: 183,366.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,862.40 : 632,693.76 = 122,263.68 : x
  2. Step 2: Convert to fraction form
    421,862.40/632,693.76 = 122,263.68/x
  3. Step 3: Cross multiply
    421,862.40x = 632,693.76 × 122,263.68
  4. Step 4: Simplify right side
    421,862.40x = 77,355,467,410.64
  5. Step 5: Solve for x
    x = 77,355,467,410.64/421,862.40
  6. Step 6: Final answer
    x = 183,366.58

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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.