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Finding the Fourth Proportional to 660,234.17, 911,126.95 and 388,313.53

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Solution

The fourth proportional to 660,234.17, 911,126.95 and 388,313.53 is: 535,874.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,234.17 : 911,126.95 = 388,313.53 : x
  2. Step 2: Convert to fraction form
    660,234.17/911,126.95 = 388,313.53/x
  3. Step 3: Cross multiply
    660,234.17x = 911,126.95 × 388,313.53
  4. Step 4: Simplify right side
    660,234.17x = 353,802,918,984.03
  5. Step 5: Solve for x
    x = 353,802,918,984.03/660,234.17
  6. Step 6: Final answer
    x = 535,874.90

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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.