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Finding the Fourth Proportional to 711,852.69, 982,356.75 and 389,562.87

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Solution

The fourth proportional to 711,852.69, 982,356.75 and 389,562.87 is: 537,596.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,852.69 : 982,356.75 = 389,562.87 : x
  2. Step 2: Convert to fraction form
    711,852.69/982,356.75 = 389,562.87/x
  3. Step 3: Cross multiply
    711,852.69x = 982,356.75 × 389,562.87
  4. Step 4: Simplify right side
    711,852.69x = 382,689,714,893.87
  5. Step 5: Solve for x
    x = 382,689,714,893.87/711,852.69
  6. Step 6: Final answer
    x = 537,596.78

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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.