Home / 1,109,778.77-1,664,679.69-390,140.61

Finding the Fourth Proportional to 1,109,778.77, 1,664,679.69 and 390,140.61

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Solution

The fourth proportional to 1,109,778.77, 1,664,679.69 and 390,140.61 is: 585,214.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109,778.77 : 1,664,679.69 = 390,140.61 : x
  2. Step 2: Convert to fraction form
    1,109,778.77/1,664,679.69 = 390,140.61/x
  3. Step 3: Cross multiply
    1,109,778.77x = 1,664,679.69 × 390,140.61
  4. Step 4: Simplify right side
    1,109,778.77x = 649,459,149,711.21
  5. Step 5: Solve for x
    x = 649,459,149,711.21/1,109,778.77
  6. Step 6: Final answer
    x = 585,214.97

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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.