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Finding the Fourth Proportional to 407,859.06, 611,850.69 and 208,070.40

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Solution

The fourth proportional to 407,859.06, 611,850.69 and 208,070.40 is: 312,137.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,859.06 : 611,850.69 = 208,070.40 : x
  2. Step 2: Convert to fraction form
    407,859.06/611,850.69 = 208,070.40/x
  3. Step 3: Cross multiply
    407,859.06x = 611,850.69 × 208,070.40
  4. Step 4: Simplify right side
    407,859.06x = 127,308,017,808.58
  5. Step 5: Solve for x
    x = 127,308,017,808.58/407,859.06
  6. Step 6: Final answer
    x = 312,137.28

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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.