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Finding the Fourth Proportional to 402,404.34, 555,317.84 and 221,127.95

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Solution

The fourth proportional to 402,404.34, 555,317.84 and 221,127.95 is: 305,156.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,404.34 : 555,317.84 = 221,127.95 : x
  2. Step 2: Convert to fraction form
    402,404.34/555,317.84 = 221,127.95/x
  3. Step 3: Cross multiply
    402,404.34x = 555,317.84 × 221,127.95
  4. Step 4: Simplify right side
    402,404.34x = 122,796,297,498.74
  5. Step 5: Solve for x
    x = 122,796,297,498.74/402,404.34
  6. Step 6: Final answer
    x = 305,156.49

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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.