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Finding the Fourth Proportional to 710,170,148.88, 979,992,517.32 and 392,611,368.30

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Solution

The fourth proportional to 710,170,148.88, 979,992,517.32 and 392,611,368.30 is: 541,780,309.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,170,148.88 : 979,992,517.32 = 392,611,368.30 : x
  2. Step 2: Convert to fraction form
    710,170,148.88/979,992,517.32 = 392,611,368.30/x
  3. Step 3: Cross multiply
    710,170,148.88x = 979,992,517.32 × 392,611,368.30
  4. Step 4: Simplify right side
    710,170,148.88x = 384,756,203,148,766,656
  5. Step 5: Solve for x
    x = 384,756,203,148,766,656/710,170,148.88
  6. Step 6: Final answer
    x = 541,780,309.63

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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.