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Finding the Fourth Proportional to 680,603.40, 939,127.53 and 394,068.12

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Solution

The fourth proportional to 680,603.40, 939,127.53 and 394,068.12 is: 543,753.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,603.40 : 939,127.53 = 394,068.12 : x
  2. Step 2: Convert to fraction form
    680,603.40/939,127.53 = 394,068.12/x
  3. Step 3: Cross multiply
    680,603.40x = 939,127.53 × 394,068.12
  4. Step 4: Simplify right side
    680,603.40x = 370,080,220,187.34
  5. Step 5: Solve for x
    x = 370,080,220,187.34/680,603.40
  6. Step 6: Final answer
    x = 543,753.12

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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.