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Finding the Fourth Proportional to 402,309.21, 555,196.49 and 221,032.88

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Solution

The fourth proportional to 402,309.21, 555,196.49 and 221,032.88 is: 305,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,309.21 : 555,196.49 = 221,032.88 : x
  2. Step 2: Convert to fraction form
    402,309.21/555,196.49 = 221,032.88/x
  3. Step 3: Cross multiply
    402,309.21x = 555,196.49 × 221,032.88
  4. Step 4: Simplify right side
    402,309.21x = 122,716,676,929.64
  5. Step 5: Solve for x
    x = 122,716,676,929.64/402,309.21
  6. Step 6: Final answer
    x = 305,030.75

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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.