Home / 712,290.81-982,961.55-390,021.33

Finding the Fourth Proportional to 712,290.81, 982,961.55 and 390,021.33

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Solution

The fourth proportional to 712,290.81, 982,961.55 and 390,021.33 is: 538,229.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,290.81 : 982,961.55 = 390,021.33 : x
  2. Step 2: Convert to fraction form
    712,290.81/982,961.55 = 390,021.33/x
  3. Step 3: Cross multiply
    712,290.81x = 982,961.55 × 390,021.33
  4. Step 4: Simplify right side
    712,290.81x = 383,375,971,069.86
  5. Step 5: Solve for x
    x = 383,375,971,069.86/712,290.81
  6. Step 6: Final answer
    x = 538,229.56

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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.