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Finding the Fourth Proportional to 616,080.20, 849,735.78 and 389,507

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Solution

The fourth proportional to 616,080.20, 849,735.78 and 389,507 is: 537,232.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,080.20 : 849,735.78 = 389,507 : x
  2. Step 2: Convert to fraction form
    616,080.20/849,735.78 = 389,507/x
  3. Step 3: Cross multiply
    616,080.20x = 849,735.78 × 389,507
  4. Step 4: Simplify right side
    616,080.20x = 330,978,034,460.46
  5. Step 5: Solve for x
    x = 330,978,034,460.46/616,080.20
  6. Step 6: Final answer
    x = 537,232.06

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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.