Home / 579,279.67-799,431.21-321,140.18

Finding the Fourth Proportional to 579,279.67, 799,431.21 and 321,140.18

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Solution

The fourth proportional to 579,279.67, 799,431.21 and 321,140.18 is: 443,187.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,279.67 : 799,431.21 = 321,140.18 : x
  2. Step 2: Convert to fraction form
    579,279.67/799,431.21 = 321,140.18/x
  3. Step 3: Cross multiply
    579,279.67x = 799,431.21 × 321,140.18
  4. Step 4: Simplify right side
    579,279.67x = 256,729,484,675.60
  5. Step 5: Solve for x
    x = 256,729,484,675.60/579,279.67
  6. Step 6: Final answer
    x = 443,187.46

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.