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Finding the Fourth Proportional to 698,363.19, 963,669.36 and 392,390.94

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Solution

The fourth proportional to 698,363.19, 963,669.36 and 392,390.94 is: 541,459.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,363.19 : 963,669.36 = 392,390.94 : x
  2. Step 2: Convert to fraction form
    698,363.19/963,669.36 = 392,390.94/x
  3. Step 3: Cross multiply
    698,363.19x = 963,669.36 × 392,390.94
  4. Step 4: Simplify right side
    698,363.19x = 378,135,126,019.60
  5. Step 5: Solve for x
    x = 378,135,126,019.60/698,363.19
  6. Step 6: Final answer
    x = 541,459.13

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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.