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Finding the Fourth Proportional to 406,616.90, 561,105.95 and 225,318.25

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Solution

The fourth proportional to 406,616.90, 561,105.95 and 225,318.25 is: 310,925.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,616.90 : 561,105.95 = 225,318.25 : x
  2. Step 2: Convert to fraction form
    406,616.90/561,105.95 = 225,318.25/x
  3. Step 3: Cross multiply
    406,616.90x = 561,105.95 × 225,318.25
  4. Step 4: Simplify right side
    406,616.90x = 126,427,409,879.12
  5. Step 5: Solve for x
    x = 126,427,409,879.12/406,616.90
  6. Step 6: Final answer
    x = 310,925.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.