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Finding the Fourth Proportional to 710,299.54, 980,236.92 and 388,039.60

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Solution

The fourth proportional to 710,299.54, 980,236.92 and 388,039.60 is: 535,507.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,299.54 : 980,236.92 = 388,039.60 : x
  2. Step 2: Convert to fraction form
    710,299.54/980,236.92 = 388,039.60/x
  3. Step 3: Cross multiply
    710,299.54x = 980,236.92 × 388,039.60
  4. Step 4: Simplify right side
    710,299.54x = 380,370,742,342.03
  5. Step 5: Solve for x
    x = 380,370,742,342.03/710,299.54
  6. Step 6: Final answer
    x = 535,507.52

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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.