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Finding the Fourth Proportional to 217,242,145.80, 325,863,218.70 and 215,730,491.40

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Solution

The fourth proportional to 217,242,145.80, 325,863,218.70 and 215,730,491.40 is: 323,595,737.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,242,145.80 : 325,863,218.70 = 215,730,491.40 : x
  2. Step 2: Convert to fraction form
    217,242,145.80/325,863,218.70 = 215,730,491.40/x
  3. Step 3: Cross multiply
    217,242,145.80x = 325,863,218.70 × 215,730,491.40
  4. Step 4: Simplify right side
    217,242,145.80x = 70,298,632,299,336,672
  5. Step 5: Solve for x
    x = 70,298,632,299,336,672/217,242,145.80
  6. Step 6: Final answer
    x = 323,595,737.10

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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.