Home / 515,931.11-712,050.62-311,983.49

Finding the Fourth Proportional to 515,931.11, 712,050.62 and 311,983.49

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Solution

The fourth proportional to 515,931.11, 712,050.62 and 311,983.49 is: 430,576.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,931.11 : 712,050.62 = 311,983.49 : x
  2. Step 2: Convert to fraction form
    515,931.11/712,050.62 = 311,983.49/x
  3. Step 3: Cross multiply
    515,931.11x = 712,050.62 × 311,983.49
  4. Step 4: Simplify right side
    515,931.11x = 222,148,032,364.09
  5. Step 5: Solve for x
    x = 222,148,032,364.09/515,931.11
  6. Step 6: Final answer
    x = 430,576.93

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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.