Home / 830,010.80-1,245,016.20-515,082.80

Finding the Fourth Proportional to 830,010.80, 1,245,016.20 and 515,082.80

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Solution

The fourth proportional to 830,010.80, 1,245,016.20 and 515,082.80 is: 772,624.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,010.80 : 1,245,016.20 = 515,082.80 : x
  2. Step 2: Convert to fraction form
    830,010.80/1,245,016.20 = 515,082.80/x
  3. Step 3: Cross multiply
    830,010.80x = 1,245,016.20 × 515,082.80
  4. Step 4: Simplify right side
    830,010.80x = 641,286,430,341.36
  5. Step 5: Solve for x
    x = 641,286,430,341.36/830,010.80
  6. Step 6: Final answer
    x = 772,624.20

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Half scale
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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.