Home / 687,388.85-1,030,949.78-345,741.18

Finding the Fourth Proportional to 687,388.85, 1,030,949.78 and 345,741.18

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Solution

The fourth proportional to 687,388.85, 1,030,949.78 and 345,741.18 is: 518,544.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,388.85 : 1,030,949.78 = 345,741.18 : x
  2. Step 2: Convert to fraction form
    687,388.85/1,030,949.78 = 345,741.18/x
  3. Step 3: Cross multiply
    687,388.85x = 1,030,949.78 × 345,741.18
  4. Step 4: Simplify right side
    687,388.85x = 356,441,787,863.17
  5. Step 5: Solve for x
    x = 356,441,787,863.17/687,388.85
  6. Step 6: Final answer
    x = 518,544.62

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1.5x scale

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.