Home / 720,465,447.30-994,243,167.54-390,440,586.30

Finding the Fourth Proportional to 720,465,447.30, 994,243,167.54 and 390,440,586.30

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Solution

The fourth proportional to 720,465,447.30, 994,243,167.54 and 390,440,586.30 is: 538,808,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,447.30 : 994,243,167.54 = 390,440,586.30 : x
  2. Step 2: Convert to fraction form
    720,465,447.30/994,243,167.54 = 390,440,586.30/x
  3. Step 3: Cross multiply
    720,465,447.30x = 994,243,167.54 × 390,440,586.30
  4. Step 4: Simplify right side
    720,465,447.30x = 388,192,885,259,086,720
  5. Step 5: Solve for x
    x = 388,192,885,259,086,720/720,465,447.30
  6. Step 6: Final answer
    x = 538,808,469.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.