Home / 447,110.71-618,637.39-389,869.40

Finding the Fourth Proportional to 447,110.71, 618,637.39 and 389,869.40

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Solution

The fourth proportional to 447,110.71, 618,637.39 and 389,869.40 is: 539,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,110.71 : 618,637.39 = 389,869.40 : x
  2. Step 2: Convert to fraction form
    447,110.71/618,637.39 = 389,869.40/x
  3. Step 3: Cross multiply
    447,110.71x = 618,637.39 × 389,869.40
  4. Step 4: Simplify right side
    447,110.71x = 241,187,788,628.79
  5. Step 5: Solve for x
    x = 241,187,788,628.79/447,110.71
  6. Step 6: Final answer
    x = 539,436.40

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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.