Home / 763,700.80-1,145,119.20-290,401.60

Finding the Fourth Proportional to 763,700.80, 1,145,119.20 and 290,401.60

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Solution

The fourth proportional to 763,700.80, 1,145,119.20 and 290,401.60 is: 435,438.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,700.80 : 1,145,119.20 = 290,401.60 : x
  2. Step 2: Convert to fraction form
    763,700.80/1,145,119.20 = 290,401.60/x
  3. Step 3: Cross multiply
    763,700.80x = 1,145,119.20 × 290,401.60
  4. Step 4: Simplify right side
    763,700.80x = 332,544,447,870.72
  5. Step 5: Solve for x
    x = 332,544,447,870.72/763,700.80
  6. Step 6: Final answer
    x = 435,438.13

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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.