Home / 1,438,309.70-2,157,815.68-478,763.45

Finding the Fourth Proportional to 1,438,309.70, 2,157,815.68 and 478,763.45

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Solution

The fourth proportional to 1,438,309.70, 2,157,815.68 and 478,763.45 is: 718,262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,309.70 : 2,157,815.68 = 478,763.45 : x
  2. Step 2: Convert to fraction form
    1,438,309.70/2,157,815.68 = 478,763.45/x
  3. Step 3: Cross multiply
    1,438,309.70x = 2,157,815.68 × 478,763.45
  4. Step 4: Simplify right side
    1,438,309.70x = 1,033,083,279,420.90
  5. Step 5: Solve for x
    x = 1,033,083,279,420.90/1,438,309.70
  6. Step 6: Final answer
    x = 718,262.05

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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.