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Finding the Fourth Proportional to 712,008.82, 982,581.41 and 389,712

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Solution

The fourth proportional to 712,008.82, 982,581.41 and 389,712 is: 537,807.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,008.82 : 982,581.41 = 389,712 : x
  2. Step 2: Convert to fraction form
    712,008.82/982,581.41 = 389,712/x
  3. Step 3: Cross multiply
    712,008.82x = 982,581.41 × 389,712
  4. Step 4: Simplify right side
    712,008.82x = 382,923,766,453.92
  5. Step 5: Solve for x
    x = 382,923,766,453.92/712,008.82
  6. Step 6: Final answer
    x = 537,807.62

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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.