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Finding the Fourth Proportional to 415,447.20, 623,138.40 and 162,678.60

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Solution

The fourth proportional to 415,447.20, 623,138.40 and 162,678.60 is: 244,005.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,447.20 : 623,138.40 = 162,678.60 : x
  2. Step 2: Convert to fraction form
    415,447.20/623,138.40 = 162,678.60/x
  3. Step 3: Cross multiply
    415,447.20x = 623,138.40 × 162,678.60
  4. Step 4: Simplify right side
    415,447.20x = 101,371,282,518.24
  5. Step 5: Solve for x
    x = 101,371,282,518.24/415,447.20
  6. Step 6: Final answer
    x = 244,005.21

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1.5x scale

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.