Home / 718,706.60-991,811.07-396,415.97

Finding the Fourth Proportional to 718,706.60, 991,811.07 and 396,415.97

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Solution

The fourth proportional to 718,706.60, 991,811.07 and 396,415.97 is: 547,051.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,706.60 : 991,811.07 = 396,415.97 : x
  2. Step 2: Convert to fraction form
    718,706.60/991,811.07 = 396,415.97/x
  3. Step 3: Cross multiply
    718,706.60x = 991,811.07 × 396,415.97
  4. Step 4: Simplify right side
    718,706.60x = 393,169,742,411.73
  5. Step 5: Solve for x
    x = 393,169,742,411.73/718,706.60
  6. Step 6: Final answer
    x = 547,051.81

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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.