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Finding the Fourth Proportional to 719,070.11, 992,315.57 and 396,779.96

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Solution

The fourth proportional to 719,070.11, 992,315.57 and 396,779.96 is: 547,555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,070.11 : 992,315.57 = 396,779.96 : x
  2. Step 2: Convert to fraction form
    719,070.11/992,315.57 = 396,779.96/x
  3. Step 3: Cross multiply
    719,070.11x = 992,315.57 × 396,779.96
  4. Step 4: Simplify right side
    719,070.11x = 393,730,928,202.35
  5. Step 5: Solve for x
    x = 393,730,928,202.35/719,070.11
  6. Step 6: Final answer
    x = 547,555.69

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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.