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Finding the Fourth Proportional to 486,682.02, 729,005.13 and 391,397.67

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Solution

The fourth proportional to 486,682.02, 729,005.13 and 391,397.67 is: 586,277.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,682.02 : 729,005.13 = 391,397.67 : x
  2. Step 2: Convert to fraction form
    486,682.02/729,005.13 = 391,397.67/x
  3. Step 3: Cross multiply
    486,682.02x = 729,005.13 × 391,397.67
  4. Step 4: Simplify right side
    486,682.02x = 285,330,909,300.05
  5. Step 5: Solve for x
    x = 285,330,909,300.05/486,682.02
  6. Step 6: Final answer
    x = 586,277.89

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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.