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Finding the Fourth Proportional to 660,112.17, 910,957.79 and 373,687.66

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Solution

The fourth proportional to 660,112.17, 910,957.79 and 373,687.66 is: 515,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,112.17 : 910,957.79 = 373,687.66 : x
  2. Step 2: Convert to fraction form
    660,112.17/910,957.79 = 373,687.66/x
  3. Step 3: Cross multiply
    660,112.17x = 910,957.79 × 373,687.66
  4. Step 4: Simplify right side
    660,112.17x = 340,413,686,976.79
  5. Step 5: Solve for x
    x = 340,413,686,976.79/660,112.17
  6. Step 6: Final answer
    x = 515,690.67

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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.