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Finding the Fourth Proportional to 209,953,807.70, 314,930,711.55 and 200,387,869.70

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Solution

The fourth proportional to 209,953,807.70, 314,930,711.55 and 200,387,869.70 is: 300,581,804.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,953,807.70 : 314,930,711.55 = 200,387,869.70 : x
  2. Step 2: Convert to fraction form
    209,953,807.70/314,930,711.55 = 200,387,869.70/x
  3. Step 3: Cross multiply
    209,953,807.70x = 314,930,711.55 × 200,387,869.70
  4. Step 4: Simplify right side
    209,953,807.70x = 63,108,294,390,609,680
  5. Step 5: Solve for x
    x = 63,108,294,390,609,680/209,953,807.70
  6. Step 6: Final answer
    x = 300,581,804.55

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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.