Home / 787,990.65-1,087,480.05-439,185.30

Finding the Fourth Proportional to 787,990.65, 1,087,480.05 and 439,185.30

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Solution

The fourth proportional to 787,990.65, 1,087,480.05 and 439,185.30 is: 606,105.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,990.65 : 1,087,480.05 = 439,185.30 : x
  2. Step 2: Convert to fraction form
    787,990.65/1,087,480.05 = 439,185.30/x
  3. Step 3: Cross multiply
    787,990.65x = 1,087,480.05 × 439,185.30
  4. Step 4: Simplify right side
    787,990.65x = 477,605,252,003.27
  5. Step 5: Solve for x
    x = 477,605,252,003.27/787,990.65
  6. Step 6: Final answer
    x = 606,105.23

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Double scale
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1.5x scale

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.