Home / 686,321.80-1,028,359.14-660,077.80

Finding the Fourth Proportional to 686,321.80, 1,028,359.14 and 660,077.80

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Solution

The fourth proportional to 686,321.80, 1,028,359.14 and 660,077.80 is: 989,036.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,321.80 : 1,028,359.14 = 660,077.80 : x
  2. Step 2: Convert to fraction form
    686,321.80/1,028,359.14 = 660,077.80/x
  3. Step 3: Cross multiply
    686,321.80x = 1,028,359.14 × 660,077.80
  4. Step 4: Simplify right side
    686,321.80x = 678,797,038,741.09
  5. Step 5: Solve for x
    x = 678,797,038,741.09/686,321.80
  6. Step 6: Final answer
    x = 989,036.10

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1.5x scale

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.