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Finding the Fourth Proportional to 710,281.31, 980,172.09 and 387,992.84

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Solution

The fourth proportional to 710,281.31, 980,172.09 and 387,992.84 is: 535,421.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,281.31 : 980,172.09 = 387,992.84 : x
  2. Step 2: Convert to fraction form
    710,281.31/980,172.09 = 387,992.84/x
  3. Step 3: Cross multiply
    710,281.31x = 980,172.09 × 387,992.84
  4. Step 4: Simplify right side
    710,281.31x = 380,299,747,986.98
  5. Step 5: Solve for x
    x = 380,299,747,986.98/710,281.31
  6. Step 6: Final answer
    x = 535,421.31

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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.