Home / 839,976.30-1,259,964.45-307,320.30

Finding the Fourth Proportional to 839,976.30, 1,259,964.45 and 307,320.30

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Solution

The fourth proportional to 839,976.30, 1,259,964.45 and 307,320.30 is: 460,980.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,976.30 : 1,259,964.45 = 307,320.30 : x
  2. Step 2: Convert to fraction form
    839,976.30/1,259,964.45 = 307,320.30/x
  3. Step 3: Cross multiply
    839,976.30x = 1,259,964.45 × 307,320.30
  4. Step 4: Simplify right side
    839,976.30x = 387,212,652,763.34
  5. Step 5: Solve for x
    x = 387,212,652,763.34/839,976.30
  6. Step 6: Final answer
    x = 460,980.45

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Double scale
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Similar ratio
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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.