Home / 687,186.88-948,316.08-385,387.36

Finding the Fourth Proportional to 687,186.88, 948,316.08 and 385,387.36

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Solution

The fourth proportional to 687,186.88, 948,316.08 and 385,387.36 is: 531,833.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,186.88 : 948,316.08 = 385,387.36 : x
  2. Step 2: Convert to fraction form
    687,186.88/948,316.08 = 385,387.36/x
  3. Step 3: Cross multiply
    687,186.88x = 948,316.08 × 385,387.36
  4. Step 4: Simplify right side
    687,186.88x = 365,469,030,516.75
  5. Step 5: Solve for x
    x = 365,469,030,516.75/687,186.88
  6. Step 6: Final answer
    x = 531,833.54

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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.