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Finding the Fourth Proportional to 679,639, 937,902.90 and 377,833

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Solution

The fourth proportional to 679,639, 937,902.90 and 377,833 is: 521,410.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,639 : 937,902.90 = 377,833 : x
  2. Step 2: Convert to fraction form
    679,639/937,902.90 = 377,833/x
  3. Step 3: Cross multiply
    679,639x = 937,902.90 × 377,833
  4. Step 4: Simplify right side
    679,639x = 354,370,666,415.70
  5. Step 5: Solve for x
    x = 354,370,666,415.70/679,639
  6. Step 6: Final answer
    x = 521,410.14

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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.