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Finding the Fourth Proportional to 710,591.95, 980,575.09 and 388,237.87

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Solution

The fourth proportional to 710,591.95, 980,575.09 and 388,237.87 is: 535,745.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,591.95 : 980,575.09 = 388,237.87 : x
  2. Step 2: Convert to fraction form
    710,591.95/980,575.09 = 388,237.87/x
  3. Step 3: Cross multiply
    710,591.95x = 980,575.09 × 388,237.87
  4. Step 4: Simplify right side
    710,591.95x = 380,696,384,316.66
  5. Step 5: Solve for x
    x = 380,696,384,316.66/710,591.95
  6. Step 6: Final answer
    x = 535,745.42

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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.