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Finding the Fourth Proportional to 660,659.44, 991,054.76 and 211,267.40

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Solution

The fourth proportional to 660,659.44, 991,054.76 and 211,267.40 is: 316,922.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,659.44 : 991,054.76 = 211,267.40 : x
  2. Step 2: Convert to fraction form
    660,659.44/991,054.76 = 211,267.40/x
  3. Step 3: Cross multiply
    660,659.44x = 991,054.76 × 211,267.40
  4. Step 4: Simplify right side
    660,659.44x = 209,377,562,402.82
  5. Step 5: Solve for x
    x = 209,377,562,402.82/660,659.44
  6. Step 6: Final answer
    x = 316,922.08

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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.