Home / 715,971.55-988,021.79-389,274.25

Finding the Fourth Proportional to 715,971.55, 988,021.79 and 389,274.25

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Solution

The fourth proportional to 715,971.55, 988,021.79 and 389,274.25 is: 537,188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,971.55 : 988,021.79 = 389,274.25 : x
  2. Step 2: Convert to fraction form
    715,971.55/988,021.79 = 389,274.25/x
  3. Step 3: Cross multiply
    715,971.55x = 988,021.79 × 389,274.25
  4. Step 4: Simplify right side
    715,971.55x = 384,611,439,339.54
  5. Step 5: Solve for x
    x = 384,611,439,339.54/715,971.55
  6. Step 6: Final answer
    x = 537,188.16

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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.