Home / 642,476.49-886,622.81-356,001.36

Finding the Fourth Proportional to 642,476.49, 886,622.81 and 356,001.36

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Solution

The fourth proportional to 642,476.49, 886,622.81 and 356,001.36 is: 491,284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,476.49 : 886,622.81 = 356,001.36 : x
  2. Step 2: Convert to fraction form
    642,476.49/886,622.81 = 356,001.36/x
  3. Step 3: Cross multiply
    642,476.49x = 886,622.81 × 356,001.36
  4. Step 4: Simplify right side
    642,476.49x = 315,638,924,387.02
  5. Step 5: Solve for x
    x = 315,638,924,387.02/642,476.49
  6. Step 6: Final answer
    x = 491,284.79

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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.