Home / 1,230,213,405.72-1,697,698,999.26-665,698,292.40

Finding the Fourth Proportional to 1,230,213,405.72, 1,697,698,999.26 and 665,698,292.40

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Solution

The fourth proportional to 1,230,213,405.72, 1,697,698,999.26 and 665,698,292.40 is: 918,666,078.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,213,405.72 : 1,697,698,999.26 = 665,698,292.40 : x
  2. Step 2: Convert to fraction form
    1,230,213,405.72/1,697,698,999.26 = 665,698,292.40/x
  3. Step 3: Cross multiply
    1,230,213,405.72x = 1,697,698,999.26 × 665,698,292.40
  4. Step 4: Simplify right side
    1,230,213,405.72x = 1,130,155,324,816,570,880
  5. Step 5: Solve for x
    x = 1,130,155,324,816,570,880/1,230,213,405.72
  6. Step 6: Final answer
    x = 918,666,078.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.