Home / 790,659.81-1,091,109.06-428,083.61

Finding the Fourth Proportional to 790,659.81, 1,091,109.06 and 428,083.61

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Solution

The fourth proportional to 790,659.81, 1,091,109.06 and 428,083.61 is: 590,754.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,659.81 : 1,091,109.06 = 428,083.61 : x
  2. Step 2: Convert to fraction form
    790,659.81/1,091,109.06 = 428,083.61/x
  3. Step 3: Cross multiply
    790,659.81x = 1,091,109.06 × 428,083.61
  4. Step 4: Simplify right side
    790,659.81x = 467,085,899,852.96
  5. Step 5: Solve for x
    x = 467,085,899,852.96/790,659.81
  6. Step 6: Final answer
    x = 590,754.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.