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Finding the Fourth Proportional to 698,783.28, 964,298.58 and 392,872.60

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Solution

The fourth proportional to 698,783.28, 964,298.58 and 392,872.60 is: 542,151.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,783.28 : 964,298.58 = 392,872.60 : x
  2. Step 2: Convert to fraction form
    698,783.28/964,298.58 = 392,872.60/x
  3. Step 3: Cross multiply
    698,783.28x = 964,298.58 × 392,872.60
  4. Step 4: Simplify right side
    698,783.28x = 378,846,490,300.91
  5. Step 5: Solve for x
    x = 378,846,490,300.91/698,783.28
  6. Step 6: Final answer
    x = 542,151.62

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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.