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Finding the Fourth Proportional to 530,172.69, 731,645.81 and 288,455.43

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Solution

The fourth proportional to 530,172.69, 731,645.81 and 288,455.43 is: 398,072.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,172.69 : 731,645.81 = 288,455.43 : x
  2. Step 2: Convert to fraction form
    530,172.69/731,645.81 = 288,455.43/x
  3. Step 3: Cross multiply
    530,172.69x = 731,645.81 × 288,455.43
  4. Step 4: Simplify right side
    530,172.69x = 211,047,206,621.41
  5. Step 5: Solve for x
    x = 211,047,206,621.41/530,172.69
  6. Step 6: Final answer
    x = 398,072.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.