Home / 860,114.29-1,290,189.20-312,987.94

Finding the Fourth Proportional to 860,114.29, 1,290,189.20 and 312,987.94

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Solution

The fourth proportional to 860,114.29, 1,290,189.20 and 312,987.94 is: 469,488.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,114.29 : 1,290,189.20 = 312,987.94 : x
  2. Step 2: Convert to fraction form
    860,114.29/1,290,189.20 = 312,987.94/x
  3. Step 3: Cross multiply
    860,114.29x = 1,290,189.20 × 312,987.94
  4. Step 4: Simplify right side
    860,114.29x = 403,813,659,918.25
  5. Step 5: Solve for x
    x = 403,813,659,918.25/860,114.29
  6. Step 6: Final answer
    x = 469,488.37

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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.