Home / 712,306.35-982,982.64-390,016.39

Finding the Fourth Proportional to 712,306.35, 982,982.64 and 390,016.39

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Solution

The fourth proportional to 712,306.35, 982,982.64 and 390,016.39 is: 538,222.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,306.35 : 982,982.64 = 390,016.39 : x
  2. Step 2: Convert to fraction form
    712,306.35/982,982.64 = 390,016.39/x
  3. Step 3: Cross multiply
    712,306.35x = 982,982.64 × 390,016.39
  4. Step 4: Simplify right side
    712,306.35x = 383,379,340,685.47
  5. Step 5: Solve for x
    x = 383,379,340,685.47/712,306.35
  6. Step 6: Final answer
    x = 538,222.55

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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.