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Finding the Fourth Proportional to 515,860.22, 710,716.05 and 399,172.46

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Solution

The fourth proportional to 515,860.22, 710,716.05 and 399,172.46 is: 549,951.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,860.22 : 710,716.05 = 399,172.46 : x
  2. Step 2: Convert to fraction form
    515,860.22/710,716.05 = 399,172.46/x
  3. Step 3: Cross multiply
    515,860.22x = 710,716.05 × 399,172.46
  4. Step 4: Simplify right side
    515,860.22x = 283,698,270,486.40
  5. Step 5: Solve for x
    x = 283,698,270,486.40/515,860.22
  6. Step 6: Final answer
    x = 549,951.83

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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.