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Finding the Fourth Proportional to 303,390.55, 455,213.40 and 162,985.15

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Solution

The fourth proportional to 303,390.55, 455,213.40 and 162,985.15 is: 244,546.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,390.55 : 455,213.40 = 162,985.15 : x
  2. Step 2: Convert to fraction form
    303,390.55/455,213.40 = 162,985.15/x
  3. Step 3: Cross multiply
    303,390.55x = 455,213.40 × 162,985.15
  4. Step 4: Simplify right side
    303,390.55x = 74,193,024,281.01
  5. Step 5: Solve for x
    x = 74,193,024,281.01/303,390.55
  6. Step 6: Final answer
    x = 244,546.26

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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.