Home / 830,423.20-1,245,634.80-620,471.20

Finding the Fourth Proportional to 830,423.20, 1,245,634.80 and 620,471.20

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Solution

The fourth proportional to 830,423.20, 1,245,634.80 and 620,471.20 is: 930,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,423.20 : 1,245,634.80 = 620,471.20 : x
  2. Step 2: Convert to fraction form
    830,423.20/1,245,634.80 = 620,471.20/x
  3. Step 3: Cross multiply
    830,423.20x = 1,245,634.80 × 620,471.20
  4. Step 4: Simplify right side
    830,423.20x = 772,880,519,117.76
  5. Step 5: Solve for x
    x = 772,880,519,117.76/830,423.20
  6. Step 6: Final answer
    x = 930,706.80

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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.