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Finding the Fourth Proportional to 693,178.16, 956,551.68 and 387,193.77

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Solution

The fourth proportional to 693,178.16, 956,551.68 and 387,193.77 is: 534,308.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,178.16 : 956,551.68 = 387,193.77 : x
  2. Step 2: Convert to fraction form
    693,178.16/956,551.68 = 387,193.77/x
  3. Step 3: Cross multiply
    693,178.16x = 956,551.68 × 387,193.77
  4. Step 4: Simplify right side
    693,178.16x = 370,370,851,179.03
  5. Step 5: Solve for x
    x = 370,370,851,179.03/693,178.16
  6. Step 6: Final answer
    x = 534,308.31

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Double scale
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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.