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Finding the Fourth Proportional to 710,331.28, 980,244.81 and 388,033.09

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Solution

The fourth proportional to 710,331.28, 980,244.81 and 388,033.09 is: 535,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,331.28 : 980,244.81 = 388,033.09 : x
  2. Step 2: Convert to fraction form
    710,331.28/980,244.81 = 388,033.09/x
  3. Step 3: Cross multiply
    710,331.28x = 980,244.81 × 388,033.09
  4. Step 4: Simplify right side
    710,331.28x = 380,367,422,580.76
  5. Step 5: Solve for x
    x = 380,367,422,580.76/710,331.28
  6. Step 6: Final answer
    x = 535,478.91

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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.