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Finding the Fourth Proportional to 402,783.74, 555,845.64 and 221,496.93

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Solution

The fourth proportional to 402,783.74, 555,845.64 and 221,496.93 is: 305,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,783.74 : 555,845.64 = 221,496.93 : x
  2. Step 2: Convert to fraction form
    402,783.74/555,845.64 = 221,496.93/x
  3. Step 3: Cross multiply
    402,783.74x = 555,845.64 × 221,496.93
  4. Step 4: Simplify right side
    402,783.74x = 123,118,103,229.19
  5. Step 5: Solve for x
    x = 123,118,103,229.19/402,783.74
  6. Step 6: Final answer
    x = 305,668.01

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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.