Home / 712,278.06-982,943.86-389,988.24

Finding the Fourth Proportional to 712,278.06, 982,943.86 and 389,988.24

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Solution

The fourth proportional to 712,278.06, 982,943.86 and 389,988.24 is: 538,183.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,278.06 : 982,943.86 = 389,988.24 : x
  2. Step 2: Convert to fraction form
    712,278.06/982,943.86 = 389,988.24/x
  3. Step 3: Cross multiply
    712,278.06x = 982,943.86 × 389,988.24
  4. Step 4: Simplify right side
    712,278.06x = 383,336,545,980.21
  5. Step 5: Solve for x
    x = 383,336,545,980.21/712,278.06
  6. Step 6: Final answer
    x = 538,183.85

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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.