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Finding the Fourth Proportional to 660,978.38, 912,140.97 and 366,619.11

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Solution

The fourth proportional to 660,978.38, 912,140.97 and 366,619.11 is: 505,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,978.38 : 912,140.97 = 366,619.11 : x
  2. Step 2: Convert to fraction form
    660,978.38/912,140.97 = 366,619.11/x
  3. Step 3: Cross multiply
    660,978.38x = 912,140.97 × 366,619.11
  4. Step 4: Simplify right side
    660,978.38x = 334,408,314,044.73
  5. Step 5: Solve for x
    x = 334,408,314,044.73/660,978.38
  6. Step 6: Final answer
    x = 505,929.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.