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Finding the Fourth Proportional to 303,581.40, 455,501.70 and 145,728.60

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Solution

The fourth proportional to 303,581.40, 455,501.70 and 145,728.60 is: 218,655.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,581.40 : 455,501.70 = 145,728.60 : x
  2. Step 2: Convert to fraction form
    303,581.40/455,501.70 = 145,728.60/x
  3. Step 3: Cross multiply
    303,581.40x = 455,501.70 × 145,728.60
  4. Step 4: Simplify right side
    303,581.40x = 66,379,625,038.62
  5. Step 5: Solve for x
    x = 66,379,625,038.62/303,581.40
  6. Step 6: Final answer
    x = 218,655.11

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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.