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Finding the Fourth Proportional to 698,363.18, 963,669.37 and 392,390.94

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Solution

The fourth proportional to 698,363.18, 963,669.37 and 392,390.94 is: 541,459.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,363.18 : 963,669.37 = 392,390.94 : x
  2. Step 2: Convert to fraction form
    698,363.18/963,669.37 = 392,390.94/x
  3. Step 3: Cross multiply
    698,363.18x = 963,669.37 × 392,390.94
  4. Step 4: Simplify right side
    698,363.18x = 378,135,129,943.51
  5. Step 5: Solve for x
    x = 378,135,129,943.51/698,363.18
  6. Step 6: Final answer
    x = 541,459.14

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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.