Home / 645,514.88-890,798.13-355,109.48

Finding the Fourth Proportional to 645,514.88, 890,798.13 and 355,109.48

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Solution

The fourth proportional to 645,514.88, 890,798.13 and 355,109.48 is: 490,044.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,514.88 : 890,798.13 = 355,109.48 : x
  2. Step 2: Convert to fraction form
    645,514.88/890,798.13 = 355,109.48/x
  3. Step 3: Cross multiply
    645,514.88x = 890,798.13 × 355,109.48
  4. Step 4: Simplify right side
    645,514.88x = 316,330,856,275.28
  5. Step 5: Solve for x
    x = 316,330,856,275.28/645,514.88
  6. Step 6: Final answer
    x = 490,044.25

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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.