Home / 679,789.09-1,019,681.80-253,315.20

Finding the Fourth Proportional to 679,789.09, 1,019,681.80 and 253,315.20

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Solution

The fourth proportional to 679,789.09, 1,019,681.80 and 253,315.20 is: 379,972.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,789.09 : 1,019,681.80 = 253,315.20 : x
  2. Step 2: Convert to fraction form
    679,789.09/1,019,681.80 = 253,315.20/x
  3. Step 3: Cross multiply
    679,789.09x = 1,019,681.80 × 253,315.20
  4. Step 4: Simplify right side
    679,789.09x = 258,300,899,103.36
  5. Step 5: Solve for x
    x = 258,300,899,103.36/679,789.09
  6. Step 6: Final answer
    x = 379,972.12

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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.