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Finding the Fourth Proportional to 391,321.30, 549,030.80 and 391,321.30

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Solution

The fourth proportional to 391,321.30, 549,030.80 and 391,321.30 is: 549,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,321.30 : 549,030.80 = 391,321.30 : x
  2. Step 2: Convert to fraction form
    391,321.30/549,030.80 = 391,321.30/x
  3. Step 3: Cross multiply
    391,321.30x = 549,030.80 × 391,321.30
  4. Step 4: Simplify right side
    391,321.30x = 214,847,446,396.04
  5. Step 5: Solve for x
    x = 214,847,446,396.04/391,321.30
  6. Step 6: Final answer
    x = 549,030.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.