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Finding the Fourth Proportional to 406,628.79, 561,140.87 and 225,340.35

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Solution

The fourth proportional to 406,628.79, 561,140.87 and 225,340.35 is: 310,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,628.79 : 561,140.87 = 225,340.35 : x
  2. Step 2: Convert to fraction form
    406,628.79/561,140.87 = 225,340.35/x
  3. Step 3: Cross multiply
    406,628.79x = 561,140.87 × 225,340.35
  4. Step 4: Simplify right side
    406,628.79x = 126,447,680,045.11
  5. Step 5: Solve for x
    x = 126,447,680,045.11/406,628.79
  6. Step 6: Final answer
    x = 310,965.88

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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.