Home / 830,085.20-1,245,127.80-620,133.20

Finding the Fourth Proportional to 830,085.20, 1,245,127.80 and 620,133.20

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Solution

The fourth proportional to 830,085.20, 1,245,127.80 and 620,133.20 is: 930,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,085.20 : 1,245,127.80 = 620,133.20 : x
  2. Step 2: Convert to fraction form
    830,085.20/1,245,127.80 = 620,133.20/x
  3. Step 3: Cross multiply
    830,085.20x = 1,245,127.80 × 620,133.20
  4. Step 4: Simplify right side
    830,085.20x = 772,145,087,022.96
  5. Step 5: Solve for x
    x = 772,145,087,022.96/830,085.20
  6. Step 6: Final answer
    x = 930,199.80

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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.