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Finding the Fourth Proportional to 579,421.74, 799,603.78 and 321,316.86

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Solution

The fourth proportional to 579,421.74, 799,603.78 and 321,316.86 is: 443,418.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,421.74 : 799,603.78 = 321,316.86 : x
  2. Step 2: Convert to fraction form
    579,421.74/799,603.78 = 321,316.86/x
  3. Step 3: Cross multiply
    579,421.74x = 799,603.78 × 321,316.86
  4. Step 4: Simplify right side
    579,421.74x = 256,926,175,833.73
  5. Step 5: Solve for x
    x = 256,926,175,833.73/579,421.74
  6. Step 6: Final answer
    x = 443,418.25

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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.