Home / 738,686.80-1,107,706.20-339,194.80

Finding the Fourth Proportional to 738,686.80, 1,107,706.20 and 339,194.80

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Solution

The fourth proportional to 738,686.80, 1,107,706.20 and 339,194.80 is: 508,643.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,686.80 : 1,107,706.20 = 339,194.80 : x
  2. Step 2: Convert to fraction form
    738,686.80/1,107,706.20 = 339,194.80/x
  3. Step 3: Cross multiply
    738,686.80x = 1,107,706.20 × 339,194.80
  4. Step 4: Simplify right side
    738,686.80x = 375,728,182,967.76
  5. Step 5: Solve for x
    x = 375,728,182,967.76/738,686.80
  6. Step 6: Final answer
    x = 508,643.42

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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.