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Finding the Fourth Proportional to 710,635.92, 980,690.40 and 388,359.60

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Solution

The fourth proportional to 710,635.92, 980,690.40 and 388,359.60 is: 535,943.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,635.92 : 980,690.40 = 388,359.60 : x
  2. Step 2: Convert to fraction form
    710,635.92/980,690.40 = 388,359.60/x
  3. Step 3: Cross multiply
    710,635.92x = 980,690.40 × 388,359.60
  4. Step 4: Simplify right side
    710,635.92x = 380,860,531,467.84
  5. Step 5: Solve for x
    x = 380,860,531,467.84/710,635.92
  6. Step 6: Final answer
    x = 535,943.26

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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.