Home / 712,219.56-982,865.86-389,959.65

Finding the Fourth Proportional to 712,219.56, 982,865.86 and 389,959.65

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Solution

The fourth proportional to 712,219.56, 982,865.86 and 389,959.65 is: 538,145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,219.56 : 982,865.86 = 389,959.65 : x
  2. Step 2: Convert to fraction form
    712,219.56/982,865.86 = 389,959.65/x
  3. Step 3: Cross multiply
    712,219.56x = 982,865.86 × 389,959.65
  4. Step 4: Simplify right side
    712,219.56x = 383,278,026,762.55
  5. Step 5: Solve for x
    x = 383,278,026,762.55/712,219.56
  6. Step 6: Final answer
    x = 538,145.89

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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.