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Finding the Fourth Proportional to 653,220,979.80, 979,831,469.70 and 648,686,016.60

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Solution

The fourth proportional to 653,220,979.80, 979,831,469.70 and 648,686,016.60 is: 973,029,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,220,979.80 : 979,831,469.70 = 648,686,016.60 : x
  2. Step 2: Convert to fraction form
    653,220,979.80/979,831,469.70 = 648,686,016.60/x
  3. Step 3: Cross multiply
    653,220,979.80x = 979,831,469.70 × 648,686,016.60
  4. Step 4: Simplify right side
    653,220,979.80x = 635,602,973,019,016,704
  5. Step 5: Solve for x
    x = 635,602,973,019,016,704/653,220,979.80
  6. Step 6: Final answer
    x = 973,029,024.90

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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.