Home / 1,278,380.87-1,918,303.95-520,082.36

Finding the Fourth Proportional to 1,278,380.87, 1,918,303.95 and 520,082.36

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Solution

The fourth proportional to 1,278,380.87, 1,918,303.95 and 520,082.36 is: 780,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,380.87 : 1,918,303.95 = 520,082.36 : x
  2. Step 2: Convert to fraction form
    1,278,380.87/1,918,303.95 = 520,082.36/x
  3. Step 3: Cross multiply
    1,278,380.87x = 1,918,303.95 × 520,082.36
  4. Step 4: Simplify right side
    1,278,380.87x = 997,676,035,921.80
  5. Step 5: Solve for x
    x = 997,676,035,921.80/1,278,380.87
  6. Step 6: Final answer
    x = 780,421.60

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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.