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Finding the Fourth Proportional to 402,609.51, 555,613.56 and 221,335.29

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Solution

The fourth proportional to 402,609.51, 555,613.56 and 221,335.29 is: 305,449.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,609.51 : 555,613.56 = 221,335.29 : x
  2. Step 2: Convert to fraction form
    402,609.51/555,613.56 = 221,335.29/x
  3. Step 3: Cross multiply
    402,609.51x = 555,613.56 × 221,335.29
  4. Step 4: Simplify right side
    402,609.51x = 122,976,888,430.53
  5. Step 5: Solve for x
    x = 122,976,888,430.53/402,609.51
  6. Step 6: Final answer
    x = 305,449.54

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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.