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Finding the Fourth Proportional to 839,986.80, 1,259,866.80 and 334,919.40

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Solution

The fourth proportional to 839,986.80, 1,259,866.80 and 334,919.40 is: 502,333.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,986.80 : 1,259,866.80 = 334,919.40 : x
  2. Step 2: Convert to fraction form
    839,986.80/1,259,866.80 = 334,919.40/x
  3. Step 3: Cross multiply
    839,986.80x = 1,259,866.80 × 334,919.40
  4. Step 4: Simplify right side
    839,986.80x = 421,953,832,735.92
  5. Step 5: Solve for x
    x = 421,953,832,735.92/839,986.80
  6. Step 6: Final answer
    x = 502,333.89

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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.