Home / 939,872.40-1,296,988.92-510,143.28

Finding the Fourth Proportional to 939,872.40, 1,296,988.92 and 510,143.28

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Solution

The fourth proportional to 939,872.40, 1,296,988.92 and 510,143.28 is: 703,978.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,872.40 : 1,296,988.92 = 510,143.28 : x
  2. Step 2: Convert to fraction form
    939,872.40/1,296,988.92 = 510,143.28/x
  3. Step 3: Cross multiply
    939,872.40x = 1,296,988.92 × 510,143.28
  4. Step 4: Simplify right side
    939,872.40x = 661,650,181,772.46
  5. Step 5: Solve for x
    x = 661,650,181,772.46/939,872.40
  6. Step 6: Final answer
    x = 703,978.73

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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.