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Finding the Fourth Proportional to 690,887.76, 953,494.20 and 404,391.12

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Solution

The fourth proportional to 690,887.76, 953,494.20 and 404,391.12 is: 558,100.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,887.76 : 953,494.20 = 404,391.12 : x
  2. Step 2: Convert to fraction form
    690,887.76/953,494.20 = 404,391.12/x
  3. Step 3: Cross multiply
    690,887.76x = 953,494.20 × 404,391.12
  4. Step 4: Simplify right side
    690,887.76x = 385,584,587,451.50
  5. Step 5: Solve for x
    x = 385,584,587,451.50/690,887.76
  6. Step 6: Final answer
    x = 558,100.19

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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.