Home / 641,666.26-885,488.72-355,180.20

Finding the Fourth Proportional to 641,666.26, 885,488.72 and 355,180.20

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Solution

The fourth proportional to 641,666.26, 885,488.72 and 355,180.20 is: 490,142.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,666.26 : 885,488.72 = 355,180.20 : x
  2. Step 2: Convert to fraction form
    641,666.26/885,488.72 = 355,180.20/x
  3. Step 3: Cross multiply
    641,666.26x = 885,488.72 × 355,180.20
  4. Step 4: Simplify right side
    641,666.26x = 314,508,060,667.34
  5. Step 5: Solve for x
    x = 314,508,060,667.34/641,666.26
  6. Step 6: Final answer
    x = 490,142.74

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Double scale
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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.