Home / 679,739.40-1,018,442.70-442,960.20

Finding the Fourth Proportional to 679,739.40, 1,018,442.70 and 442,960.20

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Solution

The fourth proportional to 679,739.40, 1,018,442.70 and 442,960.20 is: 663,680.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,739.40 : 1,018,442.70 = 442,960.20 : x
  2. Step 2: Convert to fraction form
    679,739.40/1,018,442.70 = 442,960.20/x
  3. Step 3: Cross multiply
    679,739.40x = 1,018,442.70 × 442,960.20
  4. Step 4: Simplify right side
    679,739.40x = 451,129,582,080.54
  5. Step 5: Solve for x
    x = 451,129,582,080.54/679,739.40
  6. Step 6: Final answer
    x = 663,680.20

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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.