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Finding the Fourth Proportional to 449,637.16, 674,788.36 and 212,980.40

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Solution

The fourth proportional to 449,637.16, 674,788.36 and 212,980.40 is: 319,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,637.16 : 674,788.36 = 212,980.40 : x
  2. Step 2: Convert to fraction form
    449,637.16/674,788.36 = 212,980.40/x
  3. Step 3: Cross multiply
    449,637.16x = 674,788.36 × 212,980.40
  4. Step 4: Simplify right side
    449,637.16x = 143,716,694,828.14
  5. Step 5: Solve for x
    x = 143,716,694,828.14/449,637.16
  6. Step 6: Final answer
    x = 319,628.15

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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.