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Finding the Fourth Proportional to 406,127.40, 609,248.70 and 125,615.40

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Solution

The fourth proportional to 406,127.40, 609,248.70 and 125,615.40 is: 188,440.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,127.40 : 609,248.70 = 125,615.40 : x
  2. Step 2: Convert to fraction form
    406,127.40/609,248.70 = 125,615.40/x
  3. Step 3: Cross multiply
    406,127.40x = 609,248.70 × 125,615.40
  4. Step 4: Simplify right side
    406,127.40x = 76,531,019,149.98
  5. Step 5: Solve for x
    x = 76,531,019,149.98/406,127.40
  6. Step 6: Final answer
    x = 188,440.92

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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.