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Finding the Fourth Proportional to 710,726.31, 980,799.96 and 388,436.32

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Solution

The fourth proportional to 710,726.31, 980,799.96 and 388,436.32 is: 536,040.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,726.31 : 980,799.96 = 388,436.32 : x
  2. Step 2: Convert to fraction form
    710,726.31/980,799.96 = 388,436.32/x
  3. Step 3: Cross multiply
    710,726.31x = 980,799.96 × 388,436.32
  4. Step 4: Simplify right side
    710,726.31x = 380,978,320,272.37
  5. Step 5: Solve for x
    x = 380,978,320,272.37/710,726.31
  6. Step 6: Final answer
    x = 536,040.83

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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.