Home / 712,269.05-982,931.43-389,979.23

Finding the Fourth Proportional to 712,269.05, 982,931.43 and 389,979.23

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Solution

The fourth proportional to 712,269.05, 982,931.43 and 389,979.23 is: 538,171.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,269.05 : 982,931.43 = 389,979.23 : x
  2. Step 2: Convert to fraction form
    712,269.05/982,931.43 = 389,979.23/x
  3. Step 3: Cross multiply
    712,269.05x = 982,931.43 × 389,979.23
  4. Step 4: Simplify right side
    712,269.05x = 383,322,842,214.20
  5. Step 5: Solve for x
    x = 383,322,842,214.20/712,269.05
  6. Step 6: Final answer
    x = 538,171.41

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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.