Home / 678,159.20-1,014,884.16-421,886.56

Finding the Fourth Proportional to 678,159.20, 1,014,884.16 and 421,886.56

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Solution

The fourth proportional to 678,159.20, 1,014,884.16 and 421,886.56 is: 631,365.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,159.20 : 1,014,884.16 = 421,886.56 : x
  2. Step 2: Convert to fraction form
    678,159.20/1,014,884.16 = 421,886.56/x
  3. Step 3: Cross multiply
    678,159.20x = 1,014,884.16 × 421,886.56
  4. Step 4: Simplify right side
    678,159.20x = 428,165,987,060.89
  5. Step 5: Solve for x
    x = 428,165,987,060.89/678,159.20
  6. Step 6: Final answer
    x = 631,365.01

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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.