Home / 714,785.76-986,421.58-388,112.66

Finding the Fourth Proportional to 714,785.76, 986,421.58 and 388,112.66

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Solution

The fourth proportional to 714,785.76, 986,421.58 and 388,112.66 is: 535,604.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,785.76 : 986,421.58 = 388,112.66 : x
  2. Step 2: Convert to fraction form
    714,785.76/986,421.58 = 388,112.66/x
  3. Step 3: Cross multiply
    714,785.76x = 986,421.58 × 388,112.66
  4. Step 4: Simplify right side
    714,785.76x = 382,842,704,790.98
  5. Step 5: Solve for x
    x = 382,842,704,790.98/714,785.76
  6. Step 6: Final answer
    x = 535,604.83

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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.