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Finding the Fourth Proportional to 710,873.28, 980,978.08 and 388,580.48

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Solution

The fourth proportional to 710,873.28, 980,978.08 and 388,580.48 is: 536,226.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,873.28 : 980,978.08 = 388,580.48 : x
  2. Step 2: Convert to fraction form
    710,873.28/980,978.08 = 388,580.48/x
  3. Step 3: Cross multiply
    710,873.28x = 980,978.08 × 388,580.48
  4. Step 4: Simplify right side
    710,873.28x = 381,188,933,195.88
  5. Step 5: Solve for x
    x = 381,188,933,195.88/710,873.28
  6. Step 6: Final answer
    x = 536,226.28

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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.