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Finding the Fourth Proportional to 421,566.20, 632,130.60 and 155,189.60

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Solution

The fourth proportional to 421,566.20, 632,130.60 and 155,189.60 is: 232,703.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,566.20 : 632,130.60 = 155,189.60 : x
  2. Step 2: Convert to fraction form
    421,566.20/632,130.60 = 155,189.60/x
  3. Step 3: Cross multiply
    421,566.20x = 632,130.60 × 155,189.60
  4. Step 4: Simplify right side
    421,566.20x = 98,100,094,961.76
  5. Step 5: Solve for x
    x = 98,100,094,961.76/421,566.20
  6. Step 6: Final answer
    x = 232,703.89

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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.