Home / 690,980.68-1,035,684.78-420,512.14

Finding the Fourth Proportional to 690,980.68, 1,035,684.78 and 420,512.14

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Solution

The fourth proportional to 690,980.68, 1,035,684.78 and 420,512.14 is: 630,289.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,980.68 : 1,035,684.78 = 420,512.14 : x
  2. Step 2: Convert to fraction form
    690,980.68/1,035,684.78 = 420,512.14/x
  3. Step 3: Cross multiply
    690,980.68x = 1,035,684.78 × 420,512.14
  4. Step 4: Simplify right side
    690,980.68x = 435,518,023,203.23
  5. Step 5: Solve for x
    x = 435,518,023,203.23/690,980.68
  6. Step 6: Final answer
    x = 630,289.73

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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.