Home / 830,142.40-1,245,213.60-409,363.60

Finding the Fourth Proportional to 830,142.40, 1,245,213.60 and 409,363.60

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Solution

The fourth proportional to 830,142.40, 1,245,213.60 and 409,363.60 is: 614,045.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,142.40 : 1,245,213.60 = 409,363.60 : x
  2. Step 2: Convert to fraction form
    830,142.40/1,245,213.60 = 409,363.60/x
  3. Step 3: Cross multiply
    830,142.40x = 1,245,213.60 × 409,363.60
  4. Step 4: Simplify right side
    830,142.40x = 509,745,122,064.96
  5. Step 5: Solve for x
    x = 509,745,122,064.96/830,142.40
  6. Step 6: Final answer
    x = 614,045.40

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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.