Home / 712,105.14-982,707.80-389,845.22

Finding the Fourth Proportional to 712,105.14, 982,707.80 and 389,845.22

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Solution

The fourth proportional to 712,105.14, 982,707.80 and 389,845.22 is: 537,987.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,105.14 : 982,707.80 = 389,845.22 : x
  2. Step 2: Convert to fraction form
    712,105.14/982,707.80 = 389,845.22/x
  3. Step 3: Cross multiply
    712,105.14x = 982,707.80 × 389,845.22
  4. Step 4: Simplify right side
    712,105.14x = 383,103,938,486.72
  5. Step 5: Solve for x
    x = 383,103,938,486.72/712,105.14
  6. Step 6: Final answer
    x = 537,987.89

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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.