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Finding the Fourth Proportional to 710,851.21, 980,974.60 and 388,562.59

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Solution

The fourth proportional to 710,851.21, 980,974.60 and 388,562.59 is: 536,216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,851.21 : 980,974.60 = 388,562.59 : x
  2. Step 2: Convert to fraction form
    710,851.21/980,974.60 = 388,562.59/x
  3. Step 3: Cross multiply
    710,851.21x = 980,974.60 × 388,562.59
  4. Step 4: Simplify right side
    710,851.21x = 381,170,031,300.21
  5. Step 5: Solve for x
    x = 381,170,031,300.21/710,851.21
  6. Step 6: Final answer
    x = 536,216.34

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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.