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Finding the Fourth Proportional to 691,095.68, 953,716.80 and 385,191.78

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Solution

The fourth proportional to 691,095.68, 953,716.80 and 385,191.78 is: 531,567.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,095.68 : 953,716.80 = 385,191.78 : x
  2. Step 2: Convert to fraction form
    691,095.68/953,716.80 = 385,191.78/x
  3. Step 3: Cross multiply
    691,095.68x = 953,716.80 × 385,191.78
  4. Step 4: Simplify right side
    691,095.68x = 367,363,871,807.90
  5. Step 5: Solve for x
    x = 367,363,871,807.90/691,095.68
  6. Step 6: Final answer
    x = 531,567.31

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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.