Home / 685,629,826.72-946,227,513.64-388,324,957.04

Finding the Fourth Proportional to 685,629,826.72, 946,227,513.64 and 388,324,957.04

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Solution

The fourth proportional to 685,629,826.72, 946,227,513.64 and 388,324,957.04 is: 535,921,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,629,826.72 : 946,227,513.64 = 388,324,957.04 : x
  2. Step 2: Convert to fraction form
    685,629,826.72/946,227,513.64 = 388,324,957.04/x
  3. Step 3: Cross multiply
    685,629,826.72x = 946,227,513.64 × 388,324,957.04
  4. Step 4: Simplify right side
    685,629,826.72x = 367,443,758,584,319,040
  5. Step 5: Solve for x
    x = 367,443,758,584,319,040/685,629,826.72
  6. Step 6: Final answer
    x = 535,921,490.38

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1.5x scale

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.