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Finding the Fourth Proportional to 402,989.40, 603,965.70 and 245,050.20

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Solution

The fourth proportional to 402,989.40, 603,965.70 and 245,050.20 is: 367,260.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,989.40 : 603,965.70 = 245,050.20 : x
  2. Step 2: Convert to fraction form
    402,989.40/603,965.70 = 245,050.20/x
  3. Step 3: Cross multiply
    402,989.40x = 603,965.70 × 245,050.20
  4. Step 4: Simplify right side
    402,989.40x = 148,001,915,578.14
  5. Step 5: Solve for x
    x = 148,001,915,578.14/402,989.40
  6. Step 6: Final answer
    x = 367,260.07

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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.