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Finding the Fourth Proportional to 260,473,280.40, 390,373,997.40 and 199,587,200.40

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Solution

The fourth proportional to 260,473,280.40, 390,373,997.40 and 199,587,200.40 is: 299,123,400.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,473,280.40 : 390,373,997.40 = 199,587,200.40 : x
  2. Step 2: Convert to fraction form
    260,473,280.40/390,373,997.40 = 199,587,200.40/x
  3. Step 3: Cross multiply
    260,473,280.40x = 390,373,997.40 × 199,587,200.40
  4. Step 4: Simplify right side
    260,473,280.40x = 77,913,653,250,022,880
  5. Step 5: Solve for x
    x = 77,913,653,250,022,880/260,473,280.40
  6. Step 6: Final answer
    x = 299,123,400.03

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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.