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Finding the Fourth Proportional to 1,279,208.07, 1,918,403.86 and 521,048.07

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Solution

The fourth proportional to 1,279,208.07, 1,918,403.86 and 521,048.07 is: 781,405.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,208.07 : 1,918,403.86 = 521,048.07 : x
  2. Step 2: Convert to fraction form
    1,279,208.07/1,918,403.86 = 521,048.07/x
  3. Step 3: Cross multiply
    1,279,208.07x = 1,918,403.86 × 521,048.07
  4. Step 4: Simplify right side
    1,279,208.07x = 999,580,628,733.55
  5. Step 5: Solve for x
    x = 999,580,628,733.55/1,279,208.07
  6. Step 6: Final answer
    x = 781,405.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.