Home / 869,087.25-1,304,004.55-420,145.70

Finding the Fourth Proportional to 869,087.25, 1,304,004.55 and 420,145.70

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Solution

The fourth proportional to 869,087.25, 1,304,004.55 and 420,145.70 is: 630,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,087.25 : 1,304,004.55 = 420,145.70 : x
  2. Step 2: Convert to fraction form
    869,087.25/1,304,004.55 = 420,145.70/x
  3. Step 3: Cross multiply
    869,087.25x = 1,304,004.55 × 420,145.70
  4. Step 4: Simplify right side
    869,087.25x = 547,871,902,362.21
  5. Step 5: Solve for x
    x = 547,871,902,362.21/869,087.25
  6. Step 6: Final answer
    x = 630,399.19

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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.