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Finding the Fourth Proportional to 665,478.10, 996,904.95 and 398,445.40

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Solution

The fourth proportional to 665,478.10, 996,904.95 and 398,445.40 is: 596,882.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,478.10 : 996,904.95 = 398,445.40 : x
  2. Step 2: Convert to fraction form
    665,478.10/996,904.95 = 398,445.40/x
  3. Step 3: Cross multiply
    665,478.10x = 996,904.95 × 398,445.40
  4. Step 4: Simplify right side
    665,478.10x = 397,212,191,564.73
  5. Step 5: Solve for x
    x = 397,212,191,564.73/665,478.10
  6. Step 6: Final answer
    x = 596,882.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.