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Finding the Fourth Proportional to 402,654.94, 555,649.65 and 221,365.55

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Solution

The fourth proportional to 402,654.94, 555,649.65 and 221,365.55 is: 305,476.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,654.94 : 555,649.65 = 221,365.55 : x
  2. Step 2: Convert to fraction form
    402,654.94/555,649.65 = 221,365.55/x
  3. Step 3: Cross multiply
    402,654.94x = 555,649.65 × 221,365.55
  4. Step 4: Simplify right side
    402,654.94x = 123,001,691,768.68
  5. Step 5: Solve for x
    x = 123,001,691,768.68/402,654.94
  6. Step 6: Final answer
    x = 305,476.68

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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.