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Finding the Fourth Proportional to 260,779.30, 391,428.15 and 127,809.70

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Solution

The fourth proportional to 260,779.30, 391,428.15 and 127,809.70 is: 191,841.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,779.30 : 391,428.15 = 127,809.70 : x
  2. Step 2: Convert to fraction form
    260,779.30/391,428.15 = 127,809.70/x
  3. Step 3: Cross multiply
    260,779.30x = 391,428.15 × 127,809.70
  4. Step 4: Simplify right side
    260,779.30x = 50,028,314,423.06
  5. Step 5: Solve for x
    x = 50,028,314,423.06/260,779.30
  6. Step 6: Final answer
    x = 191,841.59

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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.