Home / 712,100.78-982,700.32-389,811.08

Finding the Fourth Proportional to 712,100.78, 982,700.32 and 389,811.08

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Solution

The fourth proportional to 712,100.78, 982,700.32 and 389,811.08 is: 537,939.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,100.78 : 982,700.32 = 389,811.08 : x
  2. Step 2: Convert to fraction form
    712,100.78/982,700.32 = 389,811.08/x
  3. Step 3: Cross multiply
    712,100.78x = 982,700.32 × 389,811.08
  4. Step 4: Simplify right side
    712,100.78x = 383,067,473,055.55
  5. Step 5: Solve for x
    x = 383,067,473,055.55/712,100.78
  6. Step 6: Final answer
    x = 537,939.97

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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.