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Finding the Fourth Proportional to 400,771.04, 553,438.70 and 257,779.32

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Solution

The fourth proportional to 400,771.04, 553,438.70 and 257,779.32 is: 355,976.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,771.04 : 553,438.70 = 257,779.32 : x
  2. Step 2: Convert to fraction form
    400,771.04/553,438.70 = 257,779.32/x
  3. Step 3: Cross multiply
    400,771.04x = 553,438.70 × 257,779.32
  4. Step 4: Simplify right side
    400,771.04x = 142,665,051,747.68
  5. Step 5: Solve for x
    x = 142,665,051,747.68/400,771.04
  6. Step 6: Final answer
    x = 355,976.45

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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.