Home / 685,853.70-1,029,444.56-331,116.63

Finding the Fourth Proportional to 685,853.70, 1,029,444.56 and 331,116.63

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Solution

The fourth proportional to 685,853.70, 1,029,444.56 and 331,116.63 is: 496,995.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,853.70 : 1,029,444.56 = 331,116.63 : x
  2. Step 2: Convert to fraction form
    685,853.70/1,029,444.56 = 331,116.63/x
  3. Step 3: Cross multiply
    685,853.70x = 1,029,444.56 × 331,116.63
  4. Step 4: Simplify right side
    685,853.70x = 340,866,211,823.45
  5. Step 5: Solve for x
    x = 340,866,211,823.45/685,853.70
  6. Step 6: Final answer
    x = 496,995.51

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Double scale
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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.