Home / 779,128.80-1,168,693.20-280,312.80

Finding the Fourth Proportional to 779,128.80, 1,168,693.20 and 280,312.80

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Solution

The fourth proportional to 779,128.80, 1,168,693.20 and 280,312.80 is: 420,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,128.80 : 1,168,693.20 = 280,312.80 : x
  2. Step 2: Convert to fraction form
    779,128.80/1,168,693.20 = 280,312.80/x
  3. Step 3: Cross multiply
    779,128.80x = 1,168,693.20 × 280,312.80
  4. Step 4: Simplify right side
    779,128.80x = 327,599,663,232.96
  5. Step 5: Solve for x
    x = 327,599,663,232.96/779,128.80
  6. Step 6: Final answer
    x = 420,469.20

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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.