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Finding the Fourth Proportional to 402,019.16, 555,046.07 and 249,220.64

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Solution

The fourth proportional to 402,019.16, 555,046.07 and 249,220.64 is: 344,085.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,019.16 : 555,046.07 = 249,220.64 : x
  2. Step 2: Convert to fraction form
    402,019.16/555,046.07 = 249,220.64/x
  3. Step 3: Cross multiply
    402,019.16x = 555,046.07 × 249,220.64
  4. Step 4: Simplify right side
    402,019.16x = 138,328,936,936.40
  5. Step 5: Solve for x
    x = 138,328,936,936.40/402,019.16
  6. Step 6: Final answer
    x = 344,085.44

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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.