Home / 786,221.40-1,179,623.70-313,246.20

Finding the Fourth Proportional to 786,221.40, 1,179,623.70 and 313,246.20

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Solution

The fourth proportional to 786,221.40, 1,179,623.70 and 313,246.20 is: 469,985.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,221.40 : 1,179,623.70 = 313,246.20 : x
  2. Step 2: Convert to fraction form
    786,221.40/1,179,623.70 = 313,246.20/x
  3. Step 3: Cross multiply
    786,221.40x = 1,179,623.70 × 313,246.20
  4. Step 4: Simplify right side
    786,221.40x = 369,512,641,454.94
  5. Step 5: Solve for x
    x = 369,512,641,454.94/786,221.40
  6. Step 6: Final answer
    x = 469,985.48

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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.