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Finding the Fourth Proportional to 402,612.40, 555,544.24 and 221,332

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Solution

The fourth proportional to 402,612.40, 555,544.24 and 221,332 is: 305,404.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,612.40 : 555,544.24 = 221,332 : x
  2. Step 2: Convert to fraction form
    402,612.40/555,544.24 = 221,332/x
  3. Step 3: Cross multiply
    402,612.40x = 555,544.24 × 221,332
  4. Step 4: Simplify right side
    402,612.40x = 122,959,717,727.68
  5. Step 5: Solve for x
    x = 122,959,717,727.68/402,612.40
  6. Step 6: Final answer
    x = 305,404.70

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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.