Home / 739,138.80-1,108,708.20-319,234.80

Finding the Fourth Proportional to 739,138.80, 1,108,708.20 and 319,234.80

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Solution

The fourth proportional to 739,138.80, 1,108,708.20 and 319,234.80 is: 478,852.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,138.80 : 1,108,708.20 = 319,234.80 : x
  2. Step 2: Convert to fraction form
    739,138.80/1,108,708.20 = 319,234.80/x
  3. Step 3: Cross multiply
    739,138.80x = 1,108,708.20 × 319,234.80
  4. Step 4: Simplify right side
    739,138.80x = 353,938,240,485.36
  5. Step 5: Solve for x
    x = 353,938,240,485.36/739,138.80
  6. Step 6: Final answer
    x = 478,852.20

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Half scale
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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.