Home / 1,389,211.40-2,085,129.30-857,770.40

Finding the Fourth Proportional to 1,389,211.40, 2,085,129.30 and 857,770.40

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Solution

The fourth proportional to 1,389,211.40, 2,085,129.30 and 857,770.40 is: 1,287,465.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,211.40 : 2,085,129.30 = 857,770.40 : x
  2. Step 2: Convert to fraction form
    1,389,211.40/2,085,129.30 = 857,770.40/x
  3. Step 3: Cross multiply
    1,389,211.40x = 2,085,129.30 × 857,770.40
  4. Step 4: Simplify right side
    1,389,211.40x = 1,788,562,193,712.72
  5. Step 5: Solve for x
    x = 1,788,562,193,712.72/1,389,211.40
  6. Step 6: Final answer
    x = 1,287,465.82

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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.