Home / 1,278,388.37-1,918,315.20-520,089.86

Finding the Fourth Proportional to 1,278,388.37, 1,918,315.20 and 520,089.86

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Solution

The fourth proportional to 1,278,388.37, 1,918,315.20 and 520,089.86 is: 780,432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,388.37 : 1,918,315.20 = 520,089.86 : x
  2. Step 2: Convert to fraction form
    1,278,388.37/1,918,315.20 = 520,089.86/x
  3. Step 3: Cross multiply
    1,278,388.37x = 1,918,315.20 × 520,089.86
  4. Step 4: Simplify right side
    1,278,388.37x = 997,696,283,803.87
  5. Step 5: Solve for x
    x = 997,696,283,803.87/1,278,388.37
  6. Step 6: Final answer
    x = 780,432.85

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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.