Home / 763,717.20-1,145,575.80-390,469.20

Finding the Fourth Proportional to 763,717.20, 1,145,575.80 and 390,469.20

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Solution

The fourth proportional to 763,717.20, 1,145,575.80 and 390,469.20 is: 585,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,717.20 : 1,145,575.80 = 390,469.20 : x
  2. Step 2: Convert to fraction form
    763,717.20/1,145,575.80 = 390,469.20/x
  3. Step 3: Cross multiply
    763,717.20x = 1,145,575.80 × 390,469.20
  4. Step 4: Simplify right side
    763,717.20x = 447,312,066,165.36
  5. Step 5: Solve for x
    x = 447,312,066,165.36/763,717.20
  6. Step 6: Final answer
    x = 585,703.80

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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.