Home / 711,896.40-982,417.41-389,606.31

Finding the Fourth Proportional to 711,896.40, 982,417.41 and 389,606.31

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Solution

The fourth proportional to 711,896.40, 982,417.41 and 389,606.31 is: 537,656.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,896.40 : 982,417.41 = 389,606.31 : x
  2. Step 2: Convert to fraction form
    711,896.40/982,417.41 = 389,606.31/x
  3. Step 3: Cross multiply
    711,896.40x = 982,417.41 × 389,606.31
  4. Step 4: Simplify right side
    711,896.40x = 382,756,021,989.86
  5. Step 5: Solve for x
    x = 382,756,021,989.86/711,896.40
  6. Step 6: Final answer
    x = 537,656.91

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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.