Home / 430,631.80-645,947.70-411,278.20

Finding the Fourth Proportional to 430,631.80, 645,947.70 and 411,278.20

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Solution

The fourth proportional to 430,631.80, 645,947.70 and 411,278.20 is: 616,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,631.80 : 645,947.70 = 411,278.20 : x
  2. Step 2: Convert to fraction form
    430,631.80/645,947.70 = 411,278.20/x
  3. Step 3: Cross multiply
    430,631.80x = 645,947.70 × 411,278.20
  4. Step 4: Simplify right side
    430,631.80x = 265,664,207,350.14
  5. Step 5: Solve for x
    x = 265,664,207,350.14/430,631.80
  6. Step 6: Final answer
    x = 616,917.30

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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.