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Finding the Fourth Proportional to 660,623.85, 990,973.44 and 187,272

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Solution

The fourth proportional to 660,623.85, 990,973.44 and 187,272 is: 280,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,623.85 : 990,973.44 = 187,272 : x
  2. Step 2: Convert to fraction form
    660,623.85/990,973.44 = 187,272/x
  3. Step 3: Cross multiply
    660,623.85x = 990,973.44 × 187,272
  4. Step 4: Simplify right side
    660,623.85x = 185,581,578,055.68
  5. Step 5: Solve for x
    x = 185,581,578,055.68/660,623.85
  6. Step 6: Final answer
    x = 280,918.68

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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.