Home / 693,086.40-1,039,629.60-425,980.80

Finding the Fourth Proportional to 693,086.40, 1,039,629.60 and 425,980.80

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Solution

The fourth proportional to 693,086.40, 1,039,629.60 and 425,980.80 is: 638,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,086.40 : 1,039,629.60 = 425,980.80 : x
  2. Step 2: Convert to fraction form
    693,086.40/1,039,629.60 = 425,980.80/x
  3. Step 3: Cross multiply
    693,086.40x = 1,039,629.60 × 425,980.80
  4. Step 4: Simplify right side
    693,086.40x = 442,862,248,711.68
  5. Step 5: Solve for x
    x = 442,862,248,711.68/693,086.40
  6. Step 6: Final answer
    x = 638,971.20

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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.