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Finding the Fourth Proportional to 402,623.60, 603,938 and 118,312.96

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Solution

The fourth proportional to 402,623.60, 603,938 and 118,312.96 is: 177,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,623.60 : 603,938 = 118,312.96 : x
  2. Step 2: Convert to fraction form
    402,623.60/603,938 = 118,312.96/x
  3. Step 3: Cross multiply
    402,623.60x = 603,938 × 118,312.96
  4. Step 4: Simplify right side
    402,623.60x = 71,453,692,436.48
  5. Step 5: Solve for x
    x = 71,453,692,436.48/402,623.60
  6. Step 6: Final answer
    x = 177,470.20

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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.