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Finding the Fourth Proportional to 648,011.20, 972,016.80 and 447,908.80

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Solution

The fourth proportional to 648,011.20, 972,016.80 and 447,908.80 is: 671,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,011.20 : 972,016.80 = 447,908.80 : x
  2. Step 2: Convert to fraction form
    648,011.20/972,016.80 = 447,908.80/x
  3. Step 3: Cross multiply
    648,011.20x = 972,016.80 × 447,908.80
  4. Step 4: Simplify right side
    648,011.20x = 435,374,878,467.84
  5. Step 5: Solve for x
    x = 435,374,878,467.84/648,011.20
  6. Step 6: Final answer
    x = 671,863.20

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Similar ratio
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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.