Home / 457,660.63-631,823.05-312,684.40

Finding the Fourth Proportional to 457,660.63, 631,823.05 and 312,684.40

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Solution

The fourth proportional to 457,660.63, 631,823.05 and 312,684.40 is: 431,676.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,660.63 : 631,823.05 = 312,684.40 : x
  2. Step 2: Convert to fraction form
    457,660.63/631,823.05 = 312,684.40/x
  3. Step 3: Cross multiply
    457,660.63x = 631,823.05 × 312,684.40
  4. Step 4: Simplify right side
    457,660.63x = 197,561,212,476.05
  5. Step 5: Solve for x
    x = 197,561,212,476.05/457,660.63
  6. Step 6: Final answer
    x = 431,676.22

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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.