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Finding the Fourth Proportional to 421,365.30, 632,110.95 and 155,105.52

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Solution

The fourth proportional to 421,365.30, 632,110.95 and 155,105.52 is: 232,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,365.30 : 632,110.95 = 155,105.52 : x
  2. Step 2: Convert to fraction form
    421,365.30/632,110.95 = 155,105.52/x
  3. Step 3: Cross multiply
    421,365.30x = 632,110.95 × 155,105.52
  4. Step 4: Simplify right side
    421,365.30x = 98,043,897,597.44
  5. Step 5: Solve for x
    x = 98,043,897,597.44/421,365.30
  6. Step 6: Final answer
    x = 232,681.47

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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.