Home / 830,002.20-1,245,003.30-812,506.20

Finding the Fourth Proportional to 830,002.20, 1,245,003.30 and 812,506.20

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Solution

The fourth proportional to 830,002.20, 1,245,003.30 and 812,506.20 is: 1,218,759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,002.20 : 1,245,003.30 = 812,506.20 : x
  2. Step 2: Convert to fraction form
    830,002.20/1,245,003.30 = 812,506.20/x
  3. Step 3: Cross multiply
    830,002.20x = 1,245,003.30 × 812,506.20
  4. Step 4: Simplify right side
    830,002.20x = 1,011,572,900,270.46
  5. Step 5: Solve for x
    x = 1,011,572,900,270.46/830,002.20
  6. Step 6: Final answer
    x = 1,218,759.30

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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.