Home / 481,721.10-721,804.05-402,405.90

Finding the Fourth Proportional to 481,721.10, 721,804.05 and 402,405.90

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Solution

The fourth proportional to 481,721.10, 721,804.05 and 402,405.90 is: 602,959.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,721.10 : 721,804.05 = 402,405.90 : x
  2. Step 2: Convert to fraction form
    481,721.10/721,804.05 = 402,405.90/x
  3. Step 3: Cross multiply
    481,721.10x = 721,804.05 × 402,405.90
  4. Step 4: Simplify right side
    481,721.10x = 290,458,208,363.90
  5. Step 5: Solve for x
    x = 290,458,208,363.90/481,721.10
  6. Step 6: Final answer
    x = 602,959.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.