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Finding the Fourth Proportional to 711,998.10, 982,557.72 and 389,709.90

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Solution

The fourth proportional to 711,998.10, 982,557.72 and 389,709.90 is: 537,799.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,998.10 : 982,557.72 = 389,709.90 : x
  2. Step 2: Convert to fraction form
    711,998.10/982,557.72 = 389,709.90/x
  3. Step 3: Cross multiply
    711,998.10x = 982,557.72 × 389,709.90
  4. Step 4: Simplify right side
    711,998.10x = 382,912,470,805.43
  5. Step 5: Solve for x
    x = 382,912,470,805.43/711,998.10
  6. Step 6: Final answer
    x = 537,799.85

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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.