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Finding the Fourth Proportional to 698,363.94, 963,670.40 and 392,391.69

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Solution

The fourth proportional to 698,363.94, 963,670.40 and 392,391.69 is: 541,460.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,363.94 : 963,670.40 = 392,391.69 : x
  2. Step 2: Convert to fraction form
    698,363.94/963,670.40 = 392,391.69/x
  3. Step 3: Cross multiply
    698,363.94x = 963,670.40 × 392,391.69
  4. Step 4: Simplify right side
    698,363.94x = 378,136,254,897.02
  5. Step 5: Solve for x
    x = 378,136,254,897.02/698,363.94
  6. Step 6: Final answer
    x = 541,460.17

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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.