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Finding the Fourth Proportional to 400,773.03, 553,441.44 and 257,781.30

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Solution

The fourth proportional to 400,773.03, 553,441.44 and 257,781.30 is: 355,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,773.03 : 553,441.44 = 257,781.30 : x
  2. Step 2: Convert to fraction form
    400,773.03/553,441.44 = 257,781.30/x
  3. Step 3: Cross multiply
    400,773.03x = 553,441.44 × 257,781.30
  4. Step 4: Simplify right side
    400,773.03x = 142,666,853,877.07
  5. Step 5: Solve for x
    x = 142,666,853,877.07/400,773.03
  6. Step 6: Final answer
    x = 355,979.18

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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.