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Finding the Fourth Proportional to 711,900.40, 982,422.92 and 389,610.32

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Solution

The fourth proportional to 711,900.40, 982,422.92 and 389,610.32 is: 537,662.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,900.40 : 982,422.92 = 389,610.32 : x
  2. Step 2: Convert to fraction form
    711,900.40/982,422.92 = 389,610.32/x
  3. Step 3: Cross multiply
    711,900.40x = 982,422.92 × 389,610.32
  4. Step 4: Simplify right side
    711,900.40x = 382,762,108,236.53
  5. Step 5: Solve for x
    x = 382,762,108,236.53/711,900.40
  6. Step 6: Final answer
    x = 537,662.44

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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.