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Finding the Fourth Proportional to 402,636.84, 555,417 and 255,192

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Solution

The fourth proportional to 402,636.84, 555,417 and 255,192 is: 352,024.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,636.84 : 555,417 = 255,192 : x
  2. Step 2: Convert to fraction form
    402,636.84/555,417 = 255,192/x
  3. Step 3: Cross multiply
    402,636.84x = 555,417 × 255,192
  4. Step 4: Simplify right side
    402,636.84x = 141,737,975,064
  5. Step 5: Solve for x
    x = 141,737,975,064/402,636.84
  6. Step 6: Final answer
    x = 352,024.36

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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.