Home / 621,421.08-931,541.10-396,149.22

Finding the Fourth Proportional to 621,421.08, 931,541.10 and 396,149.22

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Solution

The fourth proportional to 621,421.08, 931,541.10 and 396,149.22 is: 593,847.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,421.08 : 931,541.10 = 396,149.22 : x
  2. Step 2: Convert to fraction form
    621,421.08/931,541.10 = 396,149.22/x
  3. Step 3: Cross multiply
    621,421.08x = 931,541.10 × 396,149.22
  4. Step 4: Simplify right side
    621,421.08x = 369,029,280,162.94
  5. Step 5: Solve for x
    x = 369,029,280,162.94/621,421.08
  6. Step 6: Final answer
    x = 593,847.38

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.