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Finding the Fourth Proportional to 501,503.12, 751,102.68 and 421,600.40

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Solution

The fourth proportional to 501,503.12, 751,102.68 and 421,600.40 is: 631,432.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,503.12 : 751,102.68 = 421,600.40 : x
  2. Step 2: Convert to fraction form
    501,503.12/751,102.68 = 421,600.40/x
  3. Step 3: Cross multiply
    501,503.12x = 751,102.68 × 421,600.40
  4. Step 4: Simplify right side
    501,503.12x = 316,665,190,329.07
  5. Step 5: Solve for x
    x = 316,665,190,329.07/501,503.12
  6. Step 6: Final answer
    x = 631,432.14

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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.