Home / 678,159.70-1,014,884.91-421,887.06

Finding the Fourth Proportional to 678,159.70, 1,014,884.91 and 421,887.06

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Solution

The fourth proportional to 678,159.70, 1,014,884.91 and 421,887.06 is: 631,365.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,159.70 : 1,014,884.91 = 421,887.06 : x
  2. Step 2: Convert to fraction form
    678,159.70/1,014,884.91 = 421,887.06/x
  3. Step 3: Cross multiply
    678,159.70x = 1,014,884.91 × 421,887.06
  4. Step 4: Simplify right side
    678,159.70x = 428,166,810,918.27
  5. Step 5: Solve for x
    x = 428,166,810,918.27/678,159.70
  6. Step 6: Final answer
    x = 631,365.75

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1.5x scale

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.