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Finding the Fourth Proportional to 402,660.56, 603,989.04 and 103,140.56

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Solution

The fourth proportional to 402,660.56, 603,989.04 and 103,140.56 is: 154,710.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,660.56 : 603,989.04 = 103,140.56 : x
  2. Step 2: Convert to fraction form
    402,660.56/603,989.04 = 103,140.56/x
  3. Step 3: Cross multiply
    402,660.56x = 603,989.04 × 103,140.56
  4. Step 4: Simplify right side
    402,660.56x = 62,295,767,819.46
  5. Step 5: Solve for x
    x = 62,295,767,819.46/402,660.56
  6. Step 6: Final answer
    x = 154,710.38

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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.