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Finding the Fourth Proportional to 402,453.20, 603,679.80 and 372,040.40

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Solution

The fourth proportional to 402,453.20, 603,679.80 and 372,040.40 is: 558,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,453.20 : 603,679.80 = 372,040.40 : x
  2. Step 2: Convert to fraction form
    402,453.20/603,679.80 = 372,040.40/x
  3. Step 3: Cross multiply
    402,453.20x = 603,679.80 × 372,040.40
  4. Step 4: Simplify right side
    402,453.20x = 224,593,274,263.92
  5. Step 5: Solve for x
    x = 224,593,274,263.92/402,453.20
  6. Step 6: Final answer
    x = 558,060.60

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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.