Home / 486,986.89-672,029.38-272,128.72

Finding the Fourth Proportional to 486,986.89, 672,029.38 and 272,128.72

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Solution

The fourth proportional to 486,986.89, 672,029.38 and 272,128.72 is: 375,530.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,986.89 : 672,029.38 = 272,128.72 : x
  2. Step 2: Convert to fraction form
    486,986.89/672,029.38 = 272,128.72/x
  3. Step 3: Cross multiply
    486,986.89x = 672,029.38 × 272,128.72
  4. Step 4: Simplify right side
    486,986.89x = 182,878,494,981.79
  5. Step 5: Solve for x
    x = 182,878,494,981.79/486,986.89
  6. Step 6: Final answer
    x = 375,530.63

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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.