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Finding the Fourth Proportional to 711,635.95, 982,071.78 and 389,352.96

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Solution

The fourth proportional to 711,635.95, 982,071.78 and 389,352.96 is: 537,314.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,635.95 : 982,071.78 = 389,352.96 : x
  2. Step 2: Convert to fraction form
    711,635.95/982,071.78 = 389,352.96/x
  3. Step 3: Cross multiply
    711,635.95x = 982,071.78 × 389,352.96
  4. Step 4: Simplify right side
    711,635.95x = 382,372,553,015.40
  5. Step 5: Solve for x
    x = 382,372,553,015.40/711,635.95
  6. Step 6: Final answer
    x = 537,314.84

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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.