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Finding the Fourth Proportional to 711,608.76, 982,003.23 and 389,321.49

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Solution

The fourth proportional to 711,608.76, 982,003.23 and 389,321.49 is: 537,254.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,608.76 : 982,003.23 = 389,321.49 : x
  2. Step 2: Convert to fraction form
    711,608.76/982,003.23 = 389,321.49/x
  3. Step 3: Cross multiply
    711,608.76x = 982,003.23 × 389,321.49
  4. Step 4: Simplify right side
    711,608.76x = 382,314,960,688.41
  5. Step 5: Solve for x
    x = 382,314,960,688.41/711,608.76
  6. Step 6: Final answer
    x = 537,254.43

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Double scale
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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.