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Finding the Fourth Proportional to 691,155.45, 953,678.93 and 385,164.77

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Solution

The fourth proportional to 691,155.45, 953,678.93 and 385,164.77 is: 531,462.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,155.45 : 953,678.93 = 385,164.77 : x
  2. Step 2: Convert to fraction form
    691,155.45/953,678.93 = 385,164.77/x
  3. Step 3: Cross multiply
    691,155.45x = 953,678.93 × 385,164.77
  4. Step 4: Simplify right side
    691,155.45x = 367,323,519,033.08
  5. Step 5: Solve for x
    x = 367,323,519,033.08/691,155.45
  6. Step 6: Final answer
    x = 531,462.96

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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.