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Finding the Fourth Proportional to 698,346.72, 963,800.76 and 392,423.76

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Solution

The fourth proportional to 698,346.72, 963,800.76 and 392,423.76 is: 541,591.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,346.72 : 963,800.76 = 392,423.76 : x
  2. Step 2: Convert to fraction form
    698,346.72/963,800.76 = 392,423.76/x
  3. Step 3: Cross multiply
    698,346.72x = 963,800.76 × 392,423.76
  4. Step 4: Simplify right side
    698,346.72x = 378,218,318,130.06
  5. Step 5: Solve for x
    x = 378,218,318,130.06/698,346.72
  6. Step 6: Final answer
    x = 541,591.03

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Double scale
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1.5x scale

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.