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Finding the Fourth Proportional to 660,609, 990,962.91 and 187,332.48

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Solution

The fourth proportional to 660,609, 990,962.91 and 187,332.48 is: 281,012.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,609 : 990,962.91 = 187,332.48 : x
  2. Step 2: Convert to fraction form
    660,609/990,962.91 = 187,332.48/x
  3. Step 3: Cross multiply
    660,609x = 990,962.91 × 187,332.48
  4. Step 4: Simplify right side
    660,609x = 185,639,539,518.32
  5. Step 5: Solve for x
    x = 185,639,539,518.32/660,609
  6. Step 6: Final answer
    x = 281,012.73

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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.