Home / 689,943.36-952,117.92-388,139.84

Finding the Fourth Proportional to 689,943.36, 952,117.92 and 388,139.84

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Solution

The fourth proportional to 689,943.36, 952,117.92 and 388,139.84 is: 535,630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,943.36 : 952,117.92 = 388,139.84 : x
  2. Step 2: Convert to fraction form
    689,943.36/952,117.92 = 388,139.84/x
  3. Step 3: Cross multiply
    689,943.36x = 952,117.92 × 388,139.84
  4. Step 4: Simplify right side
    689,943.36x = 369,554,897,129.93
  5. Step 5: Solve for x
    x = 369,554,897,129.93/689,943.36
  6. Step 6: Final answer
    x = 535,630.78

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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.