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Finding the Fourth Proportional to 630,709.72, 870,246.42 and 401,183.56

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Solution

The fourth proportional to 630,709.72, 870,246.42 and 401,183.56 is: 553,548.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,709.72 : 870,246.42 = 401,183.56 : x
  2. Step 2: Convert to fraction form
    630,709.72/870,246.42 = 401,183.56/x
  3. Step 3: Cross multiply
    630,709.72x = 870,246.42 × 401,183.56
  4. Step 4: Simplify right side
    630,709.72x = 349,128,556,852.86
  5. Step 5: Solve for x
    x = 349,128,556,852.86/630,709.72
  6. Step 6: Final answer
    x = 553,548.72

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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.