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Finding the Fourth Proportional to 406,681.70, 561,220.80 and 225,405.32

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Solution

The fourth proportional to 406,681.70, 561,220.80 and 225,405.32 is: 311,059.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,681.70 : 561,220.80 = 225,405.32 : x
  2. Step 2: Convert to fraction form
    406,681.70/561,220.80 = 225,405.32/x
  3. Step 3: Cross multiply
    406,681.70x = 561,220.80 × 225,405.32
  4. Step 4: Simplify right side
    406,681.70x = 126,502,154,014.66
  5. Step 5: Solve for x
    x = 126,502,154,014.66/406,681.70
  6. Step 6: Final answer
    x = 311,059.37

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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.