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Finding the Fourth Proportional to 447,006.40, 670,444.80 and 131,430.40

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Solution

The fourth proportional to 447,006.40, 670,444.80 and 131,430.40 is: 197,126.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,006.40 : 670,444.80 = 131,430.40 : x
  2. Step 2: Convert to fraction form
    447,006.40/670,444.80 = 131,430.40/x
  3. Step 3: Cross multiply
    447,006.40x = 670,444.80 × 131,430.40
  4. Step 4: Simplify right side
    447,006.40x = 88,116,828,241.92
  5. Step 5: Solve for x
    x = 88,116,828,241.92/447,006.40
  6. Step 6: Final answer
    x = 197,126.55

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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.