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Finding the Fourth Proportional to 690,893.30, 953,434.69 and 400,561.29

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Solution

The fourth proportional to 690,893.30, 953,434.69 and 400,561.29 is: 552,775.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,893.30 : 953,434.69 = 400,561.29 : x
  2. Step 2: Convert to fraction form
    690,893.30/953,434.69 = 400,561.29/x
  3. Step 3: Cross multiply
    690,893.30x = 953,434.69 × 400,561.29
  4. Step 4: Simplify right side
    690,893.30x = 381,909,029,357.15
  5. Step 5: Solve for x
    x = 381,909,029,357.15/690,893.30
  6. Step 6: Final answer
    x = 552,775.70

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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.