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Finding the Fourth Proportional to 690,894.18, 953,435.90 and 400,562.16

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Solution

The fourth proportional to 690,894.18, 953,435.90 and 400,562.16 is: 552,776.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,894.18 : 953,435.90 = 400,562.16 : x
  2. Step 2: Convert to fraction form
    690,894.18/953,435.90 = 400,562.16/x
  3. Step 3: Cross multiply
    690,894.18x = 953,435.90 × 400,562.16
  4. Step 4: Simplify right side
    690,894.18x = 381,910,343,525.54
  5. Step 5: Solve for x
    x = 381,910,343,525.54/690,894.18
  6. Step 6: Final answer
    x = 552,776.90

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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.