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Finding the Fourth Proportional to 660,655.43, 990,989.00 and 261,296.24

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Solution

The fourth proportional to 660,655.43, 990,989.00 and 261,296.24 is: 391,946.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,655.43 : 990,989.00 = 261,296.24 : x
  2. Step 2: Convert to fraction form
    660,655.43/990,989.00 = 261,296.24/x
  3. Step 3: Cross multiply
    660,655.43x = 990,989.00 × 261,296.24
  4. Step 4: Simplify right side
    660,655.43x = 258,941,693,319.93
  5. Step 5: Solve for x
    x = 258,941,693,319.93/660,655.43
  6. Step 6: Final answer
    x = 391,946.67

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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.