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Finding the Fourth Proportional to 390,332.67, 585,500.84 and 120,457.49

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Solution

The fourth proportional to 390,332.67, 585,500.84 and 120,457.49 is: 180,686.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,332.67 : 585,500.84 = 120,457.49 : x
  2. Step 2: Convert to fraction form
    390,332.67/585,500.84 = 120,457.49/x
  3. Step 3: Cross multiply
    390,332.67x = 585,500.84 × 120,457.49
  4. Step 4: Simplify right side
    390,332.67x = 70,527,958,049.50
  5. Step 5: Solve for x
    x = 70,527,958,049.50/390,332.67
  6. Step 6: Final answer
    x = 180,686.79

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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.