Home / 857,821.72-1,285,420.36-458,519.28

Finding the Fourth Proportional to 857,821.72, 1,285,420.36 and 458,519.28

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Solution

The fourth proportional to 857,821.72, 1,285,420.36 and 458,519.28 is: 687,077.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,821.72 : 1,285,420.36 = 458,519.28 : x
  2. Step 2: Convert to fraction form
    857,821.72/1,285,420.36 = 458,519.28/x
  3. Step 3: Cross multiply
    857,821.72x = 1,285,420.36 × 458,519.28
  4. Step 4: Simplify right side
    857,821.72x = 589,390,017,964.54
  5. Step 5: Solve for x
    x = 589,390,017,964.54/857,821.72
  6. Step 6: Final answer
    x = 687,077.52

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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.