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Finding the Fourth Proportional to 660,659.18, 990,994.62 and 261,300

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Solution

The fourth proportional to 660,659.18, 990,994.62 and 261,300 is: 391,952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,659.18 : 990,994.62 = 261,300 : x
  2. Step 2: Convert to fraction form
    660,659.18/990,994.62 = 261,300/x
  3. Step 3: Cross multiply
    660,659.18x = 990,994.62 × 261,300
  4. Step 4: Simplify right side
    660,659.18x = 258,946,894,206
  5. Step 5: Solve for x
    x = 258,946,894,206/660,659.18
  6. Step 6: Final answer
    x = 391,952.31

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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.