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Finding the Fourth Proportional to 402,020.41, 555,047.79 and 249,221.90

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Solution

The fourth proportional to 402,020.41, 555,047.79 and 249,221.90 is: 344,087.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,020.41 : 555,047.79 = 249,221.90 : x
  2. Step 2: Convert to fraction form
    402,020.41/555,047.79 = 249,221.90/x
  3. Step 3: Cross multiply
    402,020.41x = 555,047.79 × 249,221.90
  4. Step 4: Simplify right side
    402,020.41x = 138,330,064,814.60
  5. Step 5: Solve for x
    x = 138,330,064,814.60/402,020.41
  6. Step 6: Final answer
    x = 344,087.17

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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.