Home / 738,690.80-1,107,712.20-339,198.80

Finding the Fourth Proportional to 738,690.80, 1,107,712.20 and 339,198.80

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Solution

The fourth proportional to 738,690.80, 1,107,712.20 and 339,198.80 is: 508,649.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,690.80 : 1,107,712.20 = 339,198.80 : x
  2. Step 2: Convert to fraction form
    738,690.80/1,107,712.20 = 339,198.80/x
  3. Step 3: Cross multiply
    738,690.80x = 1,107,712.20 × 339,198.80
  4. Step 4: Simplify right side
    738,690.80x = 375,734,648,985.36
  5. Step 5: Solve for x
    x = 375,734,648,985.36/738,690.80
  6. Step 6: Final answer
    x = 508,649.42

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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.