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Finding the Fourth Proportional to 625,988.67, 863,731.40 and 371,422.59

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Solution

The fourth proportional to 625,988.67, 863,731.40 and 371,422.59 is: 512,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,988.67 : 863,731.40 = 371,422.59 : x
  2. Step 2: Convert to fraction form
    625,988.67/863,731.40 = 371,422.59/x
  3. Step 3: Cross multiply
    625,988.67x = 863,731.40 × 371,422.59
  4. Step 4: Simplify right side
    625,988.67x = 320,809,351,795.21
  5. Step 5: Solve for x
    x = 320,809,351,795.21/625,988.67
  6. Step 6: Final answer
    x = 512,484.28

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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.