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Finding the Fourth Proportional to 711,651.61, 982,078.06 and 389,363

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Solution

The fourth proportional to 711,651.61, 982,078.06 and 389,363 is: 537,320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,651.61 : 982,078.06 = 389,363 : x
  2. Step 2: Convert to fraction form
    711,651.61/982,078.06 = 389,363/x
  3. Step 3: Cross multiply
    711,651.61x = 982,078.06 × 389,363
  4. Step 4: Simplify right side
    711,651.61x = 382,384,859,675.78
  5. Step 5: Solve for x
    x = 382,384,859,675.78/711,651.61
  6. Step 6: Final answer
    x = 537,320.30

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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.