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Finding the Fourth Proportional to 421,172.66, 631,527.63 and 207,470.36

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Solution

The fourth proportional to 421,172.66, 631,527.63 and 207,470.36 is: 311,091.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,172.66 : 631,527.63 = 207,470.36 : x
  2. Step 2: Convert to fraction form
    421,172.66/631,527.63 = 207,470.36/x
  3. Step 3: Cross multiply
    421,172.66x = 631,527.63 × 207,470.36
  4. Step 4: Simplify right side
    421,172.66x = 131,023,264,746.05
  5. Step 5: Solve for x
    x = 131,023,264,746.05/421,172.66
  6. Step 6: Final answer
    x = 311,091.57

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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.