Home / 858,253,406.90-1,287,572,015.95-312,994,940.90

Finding the Fourth Proportional to 858,253,406.90, 1,287,572,015.95 and 312,994,940.90

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Solution

The fourth proportional to 858,253,406.90, 1,287,572,015.95 and 312,994,940.90 is: 469,562,397.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,253,406.90 : 1,287,572,015.95 = 312,994,940.90 : x
  2. Step 2: Convert to fraction form
    858,253,406.90/1,287,572,015.95 = 312,994,940.90/x
  3. Step 3: Cross multiply
    858,253,406.90x = 1,287,572,015.95 × 312,994,940.90
  4. Step 4: Simplify right side
    858,253,406.90x = 403,003,527,029,543,744
  5. Step 5: Solve for x
    x = 403,003,527,029,543,744/858,253,406.90
  6. Step 6: Final answer
    x = 469,562,397.06

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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.