Home / 718,720.96-992,161.20-512,122.72

Finding the Fourth Proportional to 718,720.96, 992,161.20 and 512,122.72

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Solution

The fourth proportional to 718,720.96, 992,161.20 and 512,122.72 is: 706,961.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,720.96 : 992,161.20 = 512,122.72 : x
  2. Step 2: Convert to fraction form
    718,720.96/992,161.20 = 512,122.72/x
  3. Step 3: Cross multiply
    718,720.96x = 992,161.20 × 512,122.72
  4. Step 4: Simplify right side
    718,720.96x = 508,108,292,422.46
  5. Step 5: Solve for x
    x = 508,108,292,422.46/718,720.96
  6. Step 6: Final answer
    x = 706,961.84

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1.5x scale

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.