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Finding the Fourth Proportional to 710,725.80, 980,799.27 and 388,435.82

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Solution

The fourth proportional to 710,725.80, 980,799.27 and 388,435.82 is: 536,040.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,725.80 : 980,799.27 = 388,435.82 : x
  2. Step 2: Convert to fraction form
    710,725.80/980,799.27 = 388,435.82/x
  3. Step 3: Cross multiply
    710,725.80x = 980,799.27 × 388,435.82
  4. Step 4: Simplify right side
    710,725.80x = 380,977,562,337.22
  5. Step 5: Solve for x
    x = 380,977,562,337.22/710,725.80
  6. Step 6: Final answer
    x = 536,040.14

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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.