Home / 402,581.60-555,556.38-221,289.65

Finding the Fourth Proportional to 402,581.60, 555,556.38 and 221,289.65

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Solution

The fourth proportional to 402,581.60, 555,556.38 and 221,289.65 is: 305,376.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,581.60 : 555,556.38 = 221,289.65 : x
  2. Step 2: Convert to fraction form
    402,581.60/555,556.38 = 221,289.65/x
  3. Step 3: Cross multiply
    402,581.60x = 555,556.38 × 221,289.65
  4. Step 4: Simplify right side
    402,581.60x = 122,938,876,885.47
  5. Step 5: Solve for x
    x = 122,938,876,885.47/402,581.60
  6. Step 6: Final answer
    x = 305,376.29

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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.